When two vectors have equal and opposite components, they point in opposite directions and have equal magnitudes, but are not necessarily perpendicular to each other.
If the eastward component of vector A is equal to the westward component of vector B and their northward components are equal, then it can be deduced that the two vectors are symmetrical with respect to the origin of the coordinate system. This means that they are equal in magnitude and opposite in direction.
(Option 2) is correct. The vectors have equal magnitudes and point in opposite directions, therefore they are equal and opposite. This is a property of vectors that are symmetrical with respect to the origin.
(Option 4) is also correct. Since the vectors are equal and opposite, they must also have equal magnitudes.
(Option 3) is incorrect. Perpendicular vectors have no component in the same direction. Since these vectors have equal and opposite eastward components, they cannot be perpendicular to each other.
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g (a) you ride your bike along a straight road for a distance d at a constant speed of 11.0 mi/hr and then for another distance 2d along the same straight road at a different constant speed. the average speed for the total trip is 13.0 mi/hr. determine your constant speed during the second part of the trip. (enter your answer to at least two decimal places.)
You ride your bike along a straight road for a distance d at a constant speed. The constant speed during the second part of the trip was 28.6 mi/hr.
Let's call the constant speed during the second part of the trip v. To find v, we need to use the equation for average speed:
Average speed = Total distance / Total time
We know the average speed for the entire trip and the distance traveled during the second part of the trip, so we can write:
13.0 mi/hr = (d + 2d) / Total time
13.0 mi/hr = 3d / Total time
We also know the time it took to travel the first part of the trip, which was at a constant speed of 11.0 mi/hr:
Time for first part = d / 11.0 mi/hr
So, the total time for the entire trip is:
Total time = d / 11.0 mi/hr + 2d / v
We can substitute the expression for average speed and the value of d we found earlier into this equation:
13.0 mi/hr = 3d / (d / 11.0 mi/hr + 2d / v)
13.0 mi/hr * (d / 11.0 mi/hr + 2d / v) = 3d
13.0 mi/hr * d / 11.0 mi/hr + 13.0 mi/hr * 2d / v = 3d
13.0 * d + 26.0 * 2d / v = 33.0 * d / 11.0
26.0 / v = 33.0 / 11.0 - 13.0
26.0 / v = 10.0 / 11.0
v = 26.0 / (10.0 / 11.0) = 26.0 * 11.0 / 10.0 = 28.6 mi/hr
So the constant speed during the second part of the trip was 28.6 mi/hr.
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Which method would be the best way of producing a plant similar to the one you already have explain 
Answer:
whats your way (look at Explanation)
Explanation:
The best method for producing a plant similar to the one you already have will depend on the specific plant and the desired outcome. Here are some common methods of plant propagation:
Seeds: This is the most traditional and natural method of propagating plants. The seeds can be collected from the parent plant, or purchased from a reputable source, and then planted in soil or another growing medium.
Cuttings: Cuttings are pieces of stem or leaf taken from the parent plant and used to grow a new plant. This method is often used for plants that are difficult to propagate from seeds, or for plants that have special qualities (such as a particular color or texture) that the grower wants to preserve.
Layering: This is a method in which a stem is bent to the ground and rooted in soil, while still attached to the parent plant. The rooted stem can then be separated from the parent plant and grown as a new plant.
Grafting: Grafting involves taking a cutting from one plant (the scion) and joining it to the rootstock of another plant. This allows the grower to combine the desirable qualities of both plants into a single plant.
Tissue Culture: Tissue culture involves taking a small piece of tissue from the parent plant and growing it in a sterile, nutrient-rich environment. This method is often used for plants that are difficult to propagate through other means, and can also be used to produce a large number of identical plants.
The best method will depend on the specific requirements of the plant and the desired outcome. Some plants may respond better to one method over others, so it's important to do some research and choose the method that is best suited for your plant.
what is a noticeably different form or state of the same substance?
Phase is a noticeably different form or state of the same substance. Plasma is one of the four states of matter that can be found in everyday life in addition to solids, liquids, and gases.
What is a material's state?These four states of matter—solids, liquids, gases, and plasma—can all be encountered in daily life. Nevertheless, a variety of other states of matter have been discovered. When a substance switches between two states of matter without actually displaying the traits of either state, some of these new states are generated.
Matter can shift states when energy is introduced into or removed from a system. Usually, temperature or pressure fluctuations are the sources of this energy. When matter changes states, phase transitions or phase alterations take place. A phase is a material's visibly changed form or state.
What do you mean when you say that a material has changed states?Solid from to. Gas to Liquid A substance changing from one physical form to another is known as a change of state. Physical changes are the basis of all state changes. Depending on the state of the substance, the particles have varying energies.
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What causes the appearance of the Moon to change throughout the lunar cycle?
the amount of sunlight reflected as the Moon revolves around Earth
the gravitational force between the Earth and the Moon
the penumbral shadow of a lunar eclipse
the amount of sunlight reflected as the Moon rotates on its axis
The change in the appearance of the Moon during the lunar cycle is due to the amount of sunlight reflected as the Moon revolves around Earth.
option A.
What causes the change in appearance of the Moon?
The change in the appearance of the Moon during the lunar cycle is due to the rotation of the moon about the earth.
The amount of Moon we see changes over the month known as lunar phases, because the Moon orbits Earth and Earth orbits the Sun.
During a lunar eclipse, Earth comes between the Sun and the Moon, blocking the sunlight falling on the Moon. Earth's shadow covers all or part of the lunar surface. So the change in the appearance of the Moon during the lunar cycle is due to the amount of sunlight reflected as the Moon revolves around Earth.
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if the wavelength of light detected is 431 nm, what is the energy in joules? use the appropriate equations and constants from your lab manual (the value for h
4.67 x 10⁻¹⁹ J is the energy in joules if the wavelength of light detected is 431 nm.
The energy of a photon can be calculated using Planck's constant (h) and the frequency (v) of the light:
E = h * v,
where v is the frequency of the light and h is Planck's constant (h = 6.626 x 10⁻³⁴ J s).
The frequency of light can be calculated from its wavelength (λ) using the equation:
v = c / λ,
where c is the speed of light in a vacuum (c = 299,792,458 m/s).
So, for a wavelength of 431 nm (431 x 10⁻⁹ m), the frequency is:
v = c / λ = 299,792,458 m/s / (431 x 10⁻⁹ m) = 6.95 x 10¹⁴ Hz.
And finally, the energy of the photon can be calculated as:
E = h * v = 6.626 x 10⁻³⁴ J s * 6.95 x 10¹⁴ Hz = 4.67 x 10⁻¹⁹ J.
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determine the coefficient of surface tension of given liquid by capillary rise method.
Answer:
5.638 divided by 32.791 is approximately equal to 0.171.
Explanation:
for mesh analysis, when do you need to create a supermesh? group of answer choices when your circuit contains a current source that is in two meshes. when your circuit contains more than two resistors. when your circuit contains any dependent source. when your circuit contains any voltage source.
You need to create a supermesh in mesh analysis when your circuit contains a current source that is in two meshes.
A supermesh is created by combining two or more meshes in a circuit that share a common current source. This combination helps to simplify the mesh equations and makes it easier to solve for the mesh currents. A current source that is in two meshes creates a situation where the current flowing through the source depends on the current in both meshes. By combining the meshes into a supermesh, you can simplify the analysis and eliminate the current source as a variable. It's important to note that supermesh analysis should only be used when the circuit contains a current source that is in two meshes, not when the circuit contains more than two resistors, any dependent source, or any voltage source.
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a leaky 10-kg bucket is lifted from the ground to a height of 16 m at a constant speed with a rope that weighs 0.7 kg/m. initially the bucket contains 48 kg of water, but the water leaks at a constant rate and finishes draining just as the bucket reaches the 16-m level. find the work done. (use 9.8 m/s2 for g.)
The required work done in lifting the bucket and the water is W = 424.736 J.
How we calculate the work done from the height of object?The work done in lifting the bucket and the water can be calculated as:
W = [tex]m_{bucket}[/tex] * g * h + [tex]m_{water}[/tex] * g * h
where m_bucket is the mass of the bucket, m_water is the initial mass of water in the bucket, g is the acceleration due to gravity (9.8 m/s^2), and h is the height lifted (16 m).
However, since the water is leaking, the mass of water decreases over time. The final mass of water can be calculated as m_water = m_initial - kt, where k is the constant rate of leakage and t is the time taken to lift the bucket.
So, the work done can be expressed as:W = [tex]m_{bucket}[/tex] * g * h + ([tex]m_{initial}[/tex] - kt) * g * h
W = (m_bucket + [tex]m_{initial}[/tex] - kt) * g * h
W = (10 + 48 - k * h / g) * 9.8 * 16
Since the water finishes draining just as the bucket reaches the 16-m level, we know that k * h / g = 48, so k = 48 * g / h = 48 * 9.8 / 16 = 30.06 kg/s.
Finally, the work done can be calculated as:
W = (10 + 48 - 30.06 * 16 / 9.8) * 9.8 * 16
W = 10 * 9.8 * 16 + 48 * 9.8 * 16 - 30.06 * 16 * 9.8
W = 158.4 + 754.4 - 488.064
W = 424.736 J
So the work done in lifting the 10-kg bucket with 48 kg of water to a height of 16 m at a constant speed with a rope that weighs 0.7 kg/m is 424.736 J.
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. if a proton is released from rest in an electric field, will it move in the direction of increasing or decreasing potential? also answer this question for an electron and a neutron. explain why.
A proton will move in the direction of increasing potential in an electric field.
An electron will move in the direction of decreasing potential in an electric field.
A neutron, being neutral, will not be affected by the electric field and will not move.
This is due to the fact that an electron has a negative charge and will be drawn to areas of lower potential, whereas a proton has a positive charge and will be drawn to areas of higher potential. Because it has no charge and is neutral, a neutron is unaffected by the electric field.
What are electrons?The English physicist J.J. Thomson made the discovery of the electron in 1897 while researching cathode rays. His discovery of electrons—originally referred to as corpuscles—revolutionized our understanding of atomic structure.
The electron is the lightest known stable subatomic particle. It has a negative charge that is equivalent to 1.602176634 × [tex]10^{-19}[/tex] coulombs, which is regarded as the fundamental unit of electric charge.
The mass of an electron is not taken into account when determining an atom's mass number because it is nearly massless when compared to a proton or neutron.
The attraction between the electrons and the nucleus in any given atom prevents the repulsion between the electrons, which would normally force them to fly apart, from preventing the electrons from moving about the nucleus in an orderly arrangement of orbitals.
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charge is distributed uniformly throughout the volume of a large insulating cylinder of radius 39.8 cm. the charge per unit length in the cylindrical volume is 34.5 nc/m. determine the magnitude of the electric field at a distance 14.8 cm from the central axis.
The electric field at a distance "r" from the central axis of a uniformly charged cylindrical volume 4.66 x 10^5 N/C.
Calculated using the following formula:
E = k * lambda / r
where "k" is the Coulomb constant (8.99 x 10^9 N m^2/C^2),
"lambda" is the linear charge density (charge per unit length),
and "r" is the distance from the central axis.
Plugging in the values from the problem, we get:
E = (8.99 x 10^9 N m^2/C^2) * (34.5 nC/m) / (14.8 cm)
Since the electric field is a vector, its magnitude is:
|E| = (8.99 x 10^9 N m^2/C^2) * (34.5 x 10^-9 C/m) / (14.8 x 10^-2 m)
|E| = 4.66 x 10^5 N/C
So the magnitude of the electric field at a distance of 14.8 cm from the central axis of the cylindrical volume is 4.66 x 10^5 N/C.
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an piece of space debris is released from rest at an altitude that is two earth radii from the center of the earth. compared to its weight on earth, the weight of this debris is
Piece of space debris is released from rest at an altitude that is two earth radii from center of the earth and compared to its weight on earth, weight of this debris is : one-quarter of the weight on surface of the earth.
How is weight related to distance?Weight of an object depends on mass and the strength of gravitational field it is in. The strength of the gravitational field at a point is proportional to the mass of the object producing the field and inversely proportional to the square of the distance from the center of the object.
At an altitude of two Earth radii from the center of the Earth, the strength of the gravitational field is weaker than it is at the surface of the Earth. Hence, the weight of the space debris at this altitude will be less than its weight on Earth.
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Match the nutrient with its food source.
Vitamin A
saturated fat
trans fat
sodium
butter
arrowRight
doughnut
arrowRight
carrots
arrowRight
salt
arrowRight
Nutrition is the study of the nutrients found in food, how the body utilizes the nutrients. The matching can be done as
vitamin A = Carrots
saturated fat = butter
trans fat = doughnut
Sodium = Salt
What is nutrient?Nutrition is the study of the nutrients found in food, how the body utilizes the nutrients, and how diet affects health and illness. Nutritionists research how foods influence the human body using ideas spanning molecular biology, biochemistry, as well as genetics.
In addition, nutrition studies how individuals may utilize their food to lower their risk of developing disease, what occurs when they take excessive or inappropriate amounts of a nutrient, as well as how allergies operate. But at the other hand, nutrients nourish the body. The matching can be done as
vitamin A = Carrots
saturated fat = butter
trans fat = doughnut
Sodium = Salt
Therefore, the matching can be done as
vitamin A = Carrots
saturated fat = butter
trans fat = doughnut
Sodium = Salt
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what is the black hole at the center of the milky way called
The Sagittarius A black hole, which is located near the Milky Way's center, made the statement.
Why is it called the Milky Way?A Greek tale about the milk-sprinkling goddess Hera gave rise to the name of the Milky Way. Our galaxy has numerous names in those other areas of the globe. It is known as the "Silver River" in China and the "Backbone of Night" in the Kalahari of southern Africa.
Where is Earth in the Milky Way?The Milky Way's Orion Arm, which is around two-thirds of the galaxy's distance from the galaxy's core, is where Earth is situated. Here, we are one of the eight planets that make up the Solar System.
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Calculate the potential energy of a 12 kg window at a height of 47 meters.
The potential energy of the window is 5527.2 joule.
What is potential energy?The energy that an item retains due to its position in relation to other objects, internal tensions, electric charge, or other reasons is known as potential energy in physics.
Potential energy can take many different forms. Some examples are an object's gravitational potential energy, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field.
The potential energy of the window is = 12 × 9.8 × 47 joule = 5527.2 joule.
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a charge of 8.65 mc m c is placed at each corner of a square 0.240 m m on a side. part a determine the magnitude of the force on each charge. express your answer to three significant figures and include the appropriate units.
(a) The magnitude of the force on each charge = 5.05 x 10⁶ N
(b) Directions of the force = along the line between the charge and the center of the square outward of the center (option 4)
Units of mass times length over time squared are used to express the strength of a force. The most used unit in metric measurements is the newton (N), which is equal to one kilogram times one meter over one second squared. This means that an item weighing one kilogram would accelerate at a rate of one meter per second squared in response to a one newton force. The pound (lb), which is the most widely used unit in English, is equal to one slug times a foot over a second squared. This means that an item having a mass of one slug would accelerate at a velocity of one foot per second squared in response to a one pound force.
Use the equation:
F net = 2 F cos(45) + F1
= 2cos(45) k q²/a²+ k q²/d²
Where,
q = the charge= 8.65 mC
d = diagonal= √2 (0.240) = 0.339
F is the force due to adjacent particle
F1 is the force due to diagonal particle
Hence,
F net = (9 x 10⁹) (0.00865)² (2 cos 45 / (0.339)²
= 5.05 x 10⁶ N
(b) the direction of the force is along the line between the charge and the center of the square outward of the center
The question is incomplete, it should be:
a charge of 8.65 mc m c is placed at each corner of a square 0.240 m m on a side. part a determine the magnitude of the force on each charge. express your answer to three significant figures and include the appropriate units.
1. along the line between the charge and the center of the square outward of the center
2. along the line between the charge and the center of the square toward the center
3. along the side of the square toward the other charge that lies on the side
4. along the side of the square outward of the other charge that lies on the side
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a person went for a walk. they walked north 6 km at 6 km/h and then west 10 km at 5 km/h. the direction of the displacement of their entire trip (west of north) is
When a person walked for 6 km towards the north at 6 km/h and then for 10 km west at 5 km/h, their total displacement travelled (west of the north) is 11.66 km in a north westerly direction.
Given the distance a parson walked towards north (d1) = 6km
The speed towards north (v1) = 6km/h
The distance person walked towards west (d2) = 10km.
The speed towards west (v2) = 5km/h
The displacement will be the shortest distance covered such that it is the resultant of these two distances.
Then displacement = √d1^2 + d2^2 = √6^2 + 10^2 = √136
The required displacement a person walked is 11.66km towards
north-west.
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what would we see if we were to view the universe from what we today consider the edge of the known universe?
The farther away we look, the farther back in time we’re able to see.
One thing we are certain about is that the Universe has an edge: not in space, but in time. Because the hot Big Bang occurred a known, finite time in the past — 13.8 billion years ago, with an uncertainty of less than 1% — there’s an “edge” to how far away we can see.
Even at the speed of light, the ultimate cosmic speed limit, there’s a fundamental limit to how far back we can see.
At distances of 31 billion light-years, corresponding to a time of just 550 million years after the Big Bang, we reach the edge.
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in a system of gas, if we double the temperature what happens to the energy of the particles? A. the energy halves b. the energy quadruples c. the energy double d. the energy stays the same
The centrifugal acceleration of the molecules twice as the temperature of a gaseous system doubles. As the temperature is raised, heat light is stored and added to the body's internal energy supply.
What are energy and its measure?Energy is the capability to accomplish labor. The amount of labor an organism's stored energy is capable of performing after it is expended. energy is a scalar quantity. The term "joule" refers to the SI unit of energy. The quantity of energy required to do one photon of activity is one joule.
What is the simplest definition of energy?Scientists refer to energy as the ability to work. Modernity is feasible because people have learned how to transfer information from one media to another and then use it to complete tasks.
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the two man-headed bulls facing each other that are symmetrical on either side of the central figure are in what type of composition?
symmetrical compositions on either side of a central figure are known as heraldic compositions, and they were typical of ancient Sumerian art.
What are heraldic compositions?Heraldry is the term for the art and science of creating, presenting, and bestowing armorial insignia as well as tracking and documenting genealogies. In the 13th century, European nobles began to utilize heraldic symbols, or "coats of arms," as a way of identifying.
heraldic design: A heraldic composition, which was a feature of Sumerian art at the period, is a composition that is symmetrical on either side of a central figure.
The art of making a coat of arms is called heraldic composition. Creating a distinctive emblem that represents a family, individual, group, or nation includes fusing symbols, colors, and designs. This kind of art has a long history that dates back to the Middle Ages when wealthy families and knights used coats of arms to differentiate themselves.
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a rock at rest is dropped from the rooftop of a tall building. the acceleration of the rock is around 10 m/s2 downwards. the distance fallen by the rock during a 1 second time interval is
If a rock at rest is dropped from the rooftop of a tall building, with the acceleration of the rock is around 10 m/s2 downwards, the distance fallen by the rock during a 1 second time interval is 5 meters.
How to calculate free falling object?In free fall, an object moves under the influence of gravitational force only. The only acceleration is the acceleration of gravity. Without influenced of air resistance, object in free fall will keep accelerating by 9.81 m/s2 or 10 m/s2.
To calculate the distance traveled by falling object, which is the velocity is equal to zero, and the time is 1 second, the formula used is :
[tex]h = \frac{1}{2}gt^{2}[/tex] = [tex]\frac{1}{2}[/tex] x 10 x [tex]1^{2}[/tex] = 5 meters
Thus, the distance fallen by the rock is 5 meters.
Through this formula, we could know that the distance does not depend on the mass of the falling object.
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a parallel-plate capacitor, with plate area a and separation d, has a capacitance of c when the space between the plates is filled with air. then the space between the plates is half filled with a dielectric material with as shown below. what is the new capacitance?
The new capacitance of a parallel-plate capacitor filled partially with a dielectric material is given by C' = C * k, where C is the original capacitance and k is the relative permittivity of the dielectric material.
When a dielectric material is introduced between the plates of a parallel-plate capacitor, the capacitance increases. The relative permittivity represents how much the material can increase the electric field between the plates compared to air. For example, if k = 2, the capacitance doubles.
The new capacitance will depend on the specific dielectric material used and the value of k for that material. It is important to note that the plate area and separation distance remain constant in this scenario.
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Since sound travels faster through things that have more particles, can you tell how much particles there are in a solid by seeing how much sound is transmitted through?
It is not possible to directly determine the number of particles based on the speed of sound alone.
What determines the speed of sound through materials?The speed of sound through a solid is determined by the density and elastic properties of the material, and not directly by the number of particles.
However, the number of particles can affect the density and elastic properties, which in turn affect the speed of sound.
So, it is possible to use the speed of sound to make inferences about the density and elastic properties of a solid, but it is not possible to directly determine the number of particles based on the speed of sound alone.
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A box (20 kg) is moving at 2.0 m/s as it slides across a level floor. It slides for 4.0 m as it comes to a complete stop. What is the average force of friction on the box as it slides?
Answer:
The average force of friction on the box is 10 Newtons.
Explanation:
Attached are pictures of my work. For some reason Brainly said there was inappropriate text. Hope this helps!
ten horsepower (hp) is how many kilowatts (kw) of power using the unit conversion ratio to make the conversion?
Ten horsepower (hp) is approximately equal to 7.457 kilowatts (kW).
How to define horsepower?
In an effort to describe the strength of steam engines, inventor James Watt coined the term "horsepower" in the 1700s.
A horsepower is a power unit used to gauge how quickly work is done. It is widely used to describe the power output of engines, motors, and other mechanical devices. It is defined as the amount of work completed in one second. Horsepower is commonly represented in either imperial or metric units and is determined as the product of torque and rotational speed. According to the accepted definition, one horsepower is equal to 746 watts.
The power an engine produces is referred to as horsepower. It is determined by the amount of force required to move 550 pounds one foot in one second.
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Ten horsepower (hp) is approximately equal to 7.457 kilowatts (kW).
1 hp = 0.7457 kW
10 hp(0.7457kW/ 1hp) = 7.457 kW
How to define horsepower?In an effort to describe the strength of steam engines, inventor James Watt coined the term "horsepower" in the 1700s.
A horsepower is a power unit used to gauge how quickly work is done. It is widely used to describe the power output of engines, motors, and other mechanical devices. It is defined as the amount of work completed in one second. Horsepower is commonly represented in either imperial or metric units and is determined as the product of torque and rotational speed. According to the accepted definition, one horsepower is equal to 746 watts.
The power an engine produces is referred to as horsepower. It is determined by the amount of force required to move 550 pounds one foot in one second.
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what is the only way that entropy can decrease in a system?
at a particular instant in time the earth is judged to be 92,955,000 miles from the sun. what is the distance in kilometers to four significant figures? (see back inside cover for conversion factor).
The distance in kilometers to four significant figures is : (b) 1.496*108 km.
How to you convert miles to kilometer?The distance in kilometers is calculated by multiplying distance in miles by 1.609344. Conversion ratio that is utilized in the formula is 1.609344 kilometers because one mile equals 1.609344 kilometers
To convert miles to kilometers, we use the conversion factor 1 mile = 1.60934 kilometers.
So, the distance in kilometers can be calculated as follows:
d (km) = d (miles) * 1.60934
d (km) = 92,955,000 miles * 1.60934 km/mile = 149,597,871.002 km
Rounding to four significant figures:
d (km) = 149,600,000 km= 1.496*108 km.
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: At a particular instant in time, the Earth is judged to be 92,955,000 miles from the Sun. What is the distance in kilometers to four significant figures? (See the back inside cover for the conversion factor).
(a) 5763*104 km
(b) 1.496*108 km
(c) 1.49596*108 km
(d) 1.483*104 km
(e) 57,759,000 km
An ideal parallel-plate capacitor has a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new capacitance? a) C/4. b) C/2. c) 20. d) 4C.
A parallel-plate capacitor's capacitance may be calculated using formula C = ε0A/d. Therefore, the providing unprecedented by four times and equals 4C if the area is quadrupled as well as separation distance is cut in half.
How will the area of the plates and the distance between them influence the capacitance of a parallel plate capacitor?The capacitor's capacitance will then quadruple. Similar to this, if we increase the capacitor's plate spacing while maintaining the same plate area, the capacitor will lose half of its initial value.
How will the capacitance change if the space between the plates gets smaller?The electric potential field created between the plates has a direct correlation with capacitance. When the plate are closer together, this field is more powerful. Therefore, capacitance rises as the space between the plates gets smaller.
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to determine an athlete's body fat, she is weighed first in air and then again while she's completely underwater. it is found that she weighs 690 n when weighed in air and 38.0 n when weighed underwater. what is her average density? express your answer with the appropriate units.
The athlete's average density is 1.06 kg/L.
From the question, we're given this information:
Weight in air = 690 NWeight underwater = 38 NThe buoyant force is 690 - 38 = 652 N
We can calculate the mass of water that is displaced using the formula
F = m * g
m of water displaced = 652 / 9.8 = 66.53 kg
Assuming a water density is the usual 1 kg/L, we can use the formula
V = mass / density
V of water displaced = 66.53 / 1 = 66.53 L
Therefore, the V of athlete is also 66.53 L
Then, we can calculate the athlete's mass using F = m * g
690 = m * 9.8
m = 690 / 9.8 = 70.41 kg
From here, since we already know the athlete's mass and volume, we can calculate her average density
Average density = 70.41 / 66.53
= 1.06 kg/L
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an object is 17.3 cm from the surface of a reflective spherical christmas-tree ornament 3.01 cm in radius. what is the apparent position of the image? answer in units of cm. answer in units of cm.
The apparent position of the image is -48.91 cm from the surface of the mirror.
The apparent position of the image can be found by using the mirror formula:
1/f = 1/d + 1/d'
Where f is the focal length of the spherical mirror, d is the object distance, and d' is the image distance.
Since the mirror is a sphere, the focal length is equal to the radius, so f = 3.01 cm.
Substituting the given values, we get:
1/3.01 = 1/17.3 + 1/d'
Solving for d', we find that:
d' = -48.91 cm
Since d' is negative, the image is virtual, erect, and located behind the mirror. The apparent position of the image is -48.91 cm from the mirror's surface.
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how much more heat per second is the pot radiating when hot compared to when the pot is at room temperature?
The heat radiating out of the pot will be increased by a factor of 16 when compared to the room temperature.
The quantity of heat transported is related to the temperature differential between the objects as well as the object's heat capacity. The heat capacity is a constant that indicates how much heat is added with each unit temperature rise.
The Stefan-Boltzmann equation of radiation governs the rate of heat transfer by emitted radiation.
q = σT⁴A
where q is the amount of heat radiated per second, σ is the Stefan-Boltzmann Constant, T is the absolute temperature, and A is the surface area.
When the absolute temperature doubles, q grows by a factor of 2⁴ = 16.
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Complete question - A clay pot at room temperature is placed in a kiln, and the pot\'s temperature doubles. how much more heat per second is the pot radiating when hot compared to when cool?