The moon moves around the earth by approximately 13.2 degrees per day.
This is because the moon completes one orbit around the earth every 27.3 days , and 360 degrees divided by 27.3 days gives us 13.2 degrees per day.
The Moon moves around Earth in an elliptical orbit, completing a full revolution around the planet every 27.322 days. This motion is caused by the force of gravity between Earth and the Moon, which is constantly pulling the Moon towards the Earth. As the Moon orbits, different parts of its surface are illuminated by the Sun, resulting in the Moon's changing phases that we observe from Earth. Additionally, as the Moon moves, it can pass in front of the Sun from Earth's perspective, causing a solar eclipse, or pass into the Earth's shadow, causing a lunar eclipse.
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a cube that measures 2 cm on each side has a surface area to volume ratio of
Size and SA:V are inversely related for a certain form. The ratio of a cube with sides of 2 cm is 3 cm1, which is half of a cube with sides of 1 cm.
In mathematics, what is the surface area?The area is the area occupied by a this double flat surface. It has a square unit of measurement. A three-dimensional object's surface area is the area occupied by its outside surface.
Describe surface area with an example.A 3D object's surface is the entire area that all of its faces cover. For instance, the surface area of a cube is its amount if we wish to determine how much paint is needed to paint it. It is consistently expressed in square units.
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2. Which is done by a machine?
A -increase work
B- increase force
C- change force
direction
D-increase velocity
A machine can increase force, change force direction, increase velocity.
What is work?A machine is a physical system that use power to exert forces, regulate movement, and carry out an action. The phrase is frequently used to refer to both manmade devices that use engines or motors as well as natural biological macromolecules like molecular machines.
To make the process easier, machines are utilized. In general, it is believed that machines enhance the quantity of work done in order to do the task quickly. However, this is untrue because energy is a form that can only be transferred, not created or destroyed, as work is a form of energy.
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materials that usually are good conductors of electricity?
Metals such as copper, aluminium, silver, and gold, graphite, electrolytes such as aqueous salt solutions, and semiconductors such as silicon and germanium are examples of materials that are typically good conductors of electricity.
What is a simple definition of electricity?The movement of electric energy or charge is known as electricity. It is a secondary energy source, meaning that we obtain it through the conversion of main energy sources like coal, natural gas, oil, nuclear power, and other natural sources. The flow of electrons between two places when there is a voltage differential between them constitutes electricity, which is a sort of energy that makes it possible to produce an electric current.
What type of energy is electricity?The electricity we use is a secondary energy source since it is produced by converting primary energy sources, such as coal, natural gas, nuclear energy, solar energy, and wind energy, into electrical power. Despite being independent properties, voltage and current interact in electrical circuits. Both are necessary for the circuit to function properly. Current in a circuit flows due to the force of voltage.
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at the instant of take-off, a long jumper has a horizontal velocity of 9.47 m/s and a vertical velocity of 3.21 m/s. find the angle of take-off (relative to the horizontal) and the magnitude of the resultant velocity vector.
The angle of take-off relative to the horizontal is 70.97 ° and the magnitude of the resultant velocity vector is 9.99 m/s.
The horizontal velocity = 9.47 m/s
The vertical velocity = 3.21 m/s
The resultant velocity is expressed by using Pythagoras as follows :
Resultant Velocity , V = √ Vx² + Vy²
Resultant Velocity , V = √ (9.47 m/s )² + ( 3.21 m/s)²
Resultant Velocity , V = 9.99 m/s
The angle of take - off :
tan Ф = Vy / Vx
Ф = tan⁻¹ ( 9.47 / 3.21 )
= 70.97 °
Thus, the angle is 70.97 ° .
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the radius of the planet mercury is 2440 km. its mass is 3.3 x 1023 kg. what is the gravitational field strength at the surface?
how did mesoamerica civilizations use astronomy--the study of stars and planets, in their everyday lives?
The answer is option A, B, and D.
Mesoamerican civilizations used astronomy in many aspects of their everyday lives. They developed calendars based on the movement of stars and planets, using observations to determine the seasons of the year and to track the cycles of agricultural planting and harvesting. They also used the movement of stars and planets to track animal herds, as the migration patterns of animals were closely tied to astronomical events.
Additionally, their beliefs about astronomy were closely tied to their religious practices, and they used their understanding of astronomy to predict the future and make decisions about important events such as wars, marriages, and trade. The study of astronomy was an integral part of the daily life of Mesoamerican civilizations and played a key role in their cultural, economic, and political development.
Complete question is provided in the image below.
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true or false? an equipotential line passing through a point is perpendicular to the direction of the electric field at that point.
The statement of equipotential lines passing through a point perpendicular to the direction of the electric field at that point is true.
Understanding the potential fieldEquipotential fields are fields where every point in the field has the same electric potential. For an electric charge, the equipotential field is a spherical shell and the electric field lines are radial and always perpendicular to the equipotential field. Any electric charge transferred in the equipotential field requires no work.
In mathematics and physics equipotential refers to a region in space where every point in it has the same potential. In electricity, it can be defined as the position of points that have similar potential values. Equipotentials are often referred to as equipotential surfaces or fields, namely fields that have a set of points that are spread continuously and have similar potentials.
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a person is holding a rock and a ball, they throw the ball down and then drop the rock, do they have the same acceleration?
No, they don't have the same acceleration because the thrown ball accelerates faster.
Acceleration is simply defined as change in velocity over time elapsed (a = Δv/t). An object is accelerating if it is slowing down, speeding up, or changing directions. Force can make objects accelerate. If an object is at rest or is moving at a constant velocity, then it's not accelerating.
Gravity in classical mechanics is defined as a type of force. Force of gravity is sometimes called weight. Weight is equal to mass times acceleration due to gravity (W = mg).
Both the ball and the rock are affected by Earth's gravity. However, since the ball's initial speed isn't zero, it moves faster than the dropped rock, and the ball will hit the ground first.
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a dark screen with a 2mm hole in it is placed between a light bulb emitting light and a viewing screen. what will you see on the viewing screen?
When the light beams that have been reflected or refracted actually touch after reflection or refraction, a true image is created. On a screen, an actual image can be obtained.
What does "screen" mean in optics?projection screen, a surface used to display an optical projector's picture. The main criteria for materials to be used as screens is a high level of reflection. The lenticular, glass bead, and mat white screens are the three most popular kinds of screens.
How do pictures show up on a screen?To generate a picture visible to a human eye, pixels on electrical devices can emit light, filter light, or reflect light. Here is an output from a laser printer that has been enlarged. The output of an inkjet printer printer is magnified below. The dots that make up the finished image can be seen.
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a spring has a natural length of 10 cm. if a 25 n force is required to keep it stretched to a length of 20 cm, how much work w (in j) is required to stretch it from 10 cm to 15 cm? (round your answer to two decimal places.)
A spring has a natural length of 10 cm then the work w (in j) is required to stretch it from 10 cm to 15 cm is 156.25 J.
We can use the formula for the work done by a spring: W = (1/2) k ([tex]x_{2}[/tex] - [tex]x_{1\\}[/tex]) where W is the work done, k is the spring constant, [tex]x_{2}[/tex] is the final length of the spring, and [tex]x_{1\\}[/tex] is the initial length of the spring.
First, we need to find the spring constant. We can use the force applied and the extension of the spring to calculate it:
F = k([tex]x_{2}[/tex] - [tex]x_{1\\}[/tex])
25 N = k (20 cm - 10 cm)
k = 2.5 N/cm
Now we can use this value of k to calculate the work done to stretch the spring from 10 cm to 15 cm:
W = (1/2) (2.5 N/cm) ((15 cm)^2 - (10 cm)^2)
W = (1/2) (2.5 N/cm) (225 cm^2 - 100 cm^2)
W = (1/2) (2.5 N/cm) (125 cm^2)
W = 156.25 J
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give 5 examples of the 3 types of heat transfer
The three modes of heat transfer are conduction, convection and radiation. Conduction takes place in solids and convection takes place in liquids and gases. Radiation is the mode of heat transfer through vacuum.
What is heat transfer ?Heat will transfer from a hotter region to the colder region due to the differential distribution of temperature. There are three modes of heat transfer namely conduction, convection and radiation. Conduction takes place in solids and convection takes place in liquids and gases. Radiation is the mode of heat transfer through vacuum.
Heat and light is reaching from the sun to earth by radiation. The ground is warming up through the conduction process. Similarly all the solid substances are heating up by conduction.
The water resources are warming up by convection currents, in which the hotter molecules rises above and make the whole liquid warm.
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Devon is applying 100N of force to pull 15kg object, but the object isn’t moving.what does this indicate about the coefficient of friction for the surface?
A) the surface has a low coefficient of friction
B) the surface has a high coefficient of friction
C) you can’t draw a conclusion from the information provided
D) the static coefficient of friction is equal to the appeal force
Answer:
B) the surface has a high coefficient of friction
When an object is not moving despite an applied force, it means that the frictional force is equal to or greater than the applied force. A high coefficient of friction indicates that the frictional force is strong, making it difficult to move the object. In this case, the frictional force is equal to the 100 N of force that Devon is applying, so the coefficient of friction for the surface must be high.
The acceleration due to gravity on the moon is 1.62 m/s^2, approximately a sixth of the value on earth. for a given initial velocity v0, and a given launch angle θ0, the ratio of the range of an ideal projectile on the moon to the range of the same projectile on earth, rmoon/rearth, will be approximately?
The ratio of the ideal projectile distance on the moon to the same projectile distance on earth, moon/back, is approximately (the acceleration of gravity on the moon is 1.62 m/s², about one-sixth of the acceleration due to gravity on earth. for a given initial velocity v0 , and the specified launch angle θ0) is ⅙ (option B)
The initial velocity, launch angle, and acceleration due to gravity all affect a projectile's range. The formula for an ideal projectile's range is as follows:
R = v0²sin (2θ0) / g
Where,
v0 = the initial velocity (m/s)
θ0 = the launch angle
g = the acceleration due to gravity
The acceleration caused by gravity is 1.62 m/s² for the moon and 9.8 m/s² for the earth. Ranges on the moon and ranges on earth can be expressed as follows:
R moon / R earth = (1.62 sin (2θ0)) / g
sin (2θ0) = 1.62 / 9.8
Approximately ⅙
Consequently, an ideal projectile's range on the moon is around a sixth of its range on Earth.
The question is incomplete, it should be:
The acceleration due to gravity on the moon is 1.62 m/s², approximately a sixth of the value on earth. for a given initial velocity v0, and a given launch angle θ0, the ratio of the range of an ideal projectile on the moon to the range of the same projectile on earth, rmoon/rearth, will be approximately?
A. ⅓
B. ⅙
C. 1
D. 1/12
E. ⅕
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the crew of a cargo plane wishes to drop a crate of supplies on a target below. to hit the target, when should the crew drop the crate? ignore air resistance. view available hint(s)for part a the crew of a cargo plane wishes to drop a crate of supplies on a target below. to hit the target, when should the crew drop the crate? ignore air resistance. when the plane is directly over the target before the plane is directly over the target after the plane has flown over the target
To hit the target with the crate of supplies, the crew should drop the crate when the plane is directly over the target.
This is because the crate will be initially moving with the same horizontal velocity as the plane. When dropped, the crate will begin to fall vertically due to the force of gravity,
Gravity is a fundamental force in the universe that causes objects to be attracted to each other. It is the force that governs the motion of planets, stars, and galaxies, and is responsible for keeping them in their orbits.
According to the theory of gravity proposed by Sir Isaac Newton, every object in the universe exerts a gravitational force on every other object, with the strength of the force depending on the mass of the objects and the distance between them. This force is proportional to the product of the masses of the two objects, and inversely proportional to the square of the distance between them
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you are loading a dart gun. the spring that launches the dart has a spring constant 3350 n/m and a normal length of 10 cm. you push the dart into the gun and it contracts the spring until it is 2.0 cm long. how much force does the spring exert on the dart the instant it is released? enter your answer in newtons (e.g if the force is 100n, enter your answer as 100)
Whatever speed can the dart gain if it separates from spring when it hits its natural lengths (x = 0)? = 3.0 m/s in the horizontal, the spring's force was the only one acting on the dart (friction was ignored).
Where on the springs motion does the speed increase the quickest?The greatest location, x=A, correspond to a velocity of zero, and the position with the maximum speed is x=0. The "initial condition" in t=0, where the mass is located at x=A and moving at v=0, corresponds to =0.Here the natural length of the spring is 35cm and the spring is compressed to 14cm in length. the force exerted on bow by the spring is 21cm/(100cm/m)=> F = 5.04N
What is the strongest dart gun available?The fastest-firing Nitro dart blaster is the N-Strike Elite HyperFire. With new batteries, this fully motorised blaster can fire up to 5 dart per second, allowing kids to pelt targets with a barrage of darts.
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Answer: 268 N
Explanation:
[tex]F_{spring} =k_{s} (L-L_{0})=-3350(0.02-0.10)[/tex]
Please help
Predict what would happen if you dropped a 1 lb ball from 10ft in the air into sand and measured the size of the crater, and then a 10lb ball from 10ft in the air and then measured the size of the crater.
Answer:
If you drop a 1 lb ball from 10 ft in the air into sand and measure the size of the crater, and then a 10 lb ball from 10 ft in the air and measure the size of the crater, you would expect to see that the crater created by the 10 lb ball is larger than the crater created by the 1 lb ball. This is because the larger mass of the 10 lb ball will result in a greater impact force upon hitting the sand, which in turn will cause a larger excavation of the sand and thus a larger crater.
two trains on separate tracks move toward each other. train 1 has a speed of 123 km/h; train 2, a speed of 66 km/h. train 2 blows its horn, emitting a frequency of 560 hz. what is the frequency heard by the engineer on train 1?
Two trains on the separate tracks move toward each other. Train 1 has speed of 123 km/h, train 2, speed of 66 km/h. Train 2 blows its horn, emitting a frequency of 560 hz. The frequency heard by the engineer on train 1 is 662.41 Hz.
Train 1 (observer) :
Speed = 109 km/h = 30.2 m/s
Train 2 (source) :
Speed = 99 km/h = 27.5 m/s
Train 2 emitting frequency = 500 Hz
The expression is as follows :
F = F' ( v + v1 / ( v - v2 )
Where
F' = 560 Hz
v is velocity of sound = 343 m/s
v1 = 30.2 m/s
v2 = 27.5 m/s
Frequency = 560 ( ( 343 + 30.2 ) / 343 - 27.5 ))
Frequency = 560 × (373.2 / 315.5)
Frequency = 662.41 Hz
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which of the following does not describe a way in which machines function? by enhancing range of motion and speed of movement so that resistance can be moved farther or faster than an applied force by balancing multiple forces by altering the resulting direction of an applied force by enhancing force in an attempt to increase total force needed to overcome a resistance
The method by which machines increase range of motion and speed of movement so that resistance can be moved farther or more quickly than an applied force is not described in the following.
Which of the following best describes the gravitational attraction of the earth on an object: biomechanics force levers?The earth pulls your body downward, which is known as gravity. The location where your body's mass is concentrated is known as your center of gravity. A hypothetical location where the force of gravity seems to act is the center of gravity (COG) of an organism.
Which of the following claims regarding friction force is false?No relative motion exists between the two contact surfaces in a rolling motion. Therefore, in a rolling motion, the friction does not do any work. Because of this, rolling friction is lower than sliding or kinetic friction.
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A potter’s wheel moves from rest to an angular speed of 0.30 rev/s in 25.0 s.
Assuming constant angular acceleration,
what is its angular acceleration in rad/s^2
?
Answer in units of rad/s^2
The angular acceleration for the potter's wheel is 0.012 rad/s².
How to calculate angular acceleration?The equation for angular velocity with constant angular acceleration is given by:
ωf = ωi + αt
where ωf is the final angular velocity, ωi is the initial angular velocity (which is 0 in this case), α is the angular acceleration, and t is the time.
Plugging in the given values, we have:
0.30 rad/s = 0 + α x 25.0 s
Dividing both sides by 25.0 s, we get:
α = 0.30 rad/s / 25.0 s = 0.012 rad/s²
So the angular acceleration is 0.012 rad/s².
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a cat jumps straight up 3.00 m. how much time does it spend in the top 1.00 m (ascending and descending)?
The cat spends equal amounts of time ascending and descending, it spends a total of approximately 0.449 s in the top 1 m of its jump.
To determine the time spent by the cat in the top 1 m, we need to find the time it takes to travel the first 1 m of its 3 m jump. The motion of the cat can be modeled as a vertical, projectile motion problem. The time it takes to travel a given vertical distance can be found using the formula:
[tex]$t = \sqrt{\frac{2d}{g}}$[/tex]
Where d is the vertical distance traveled and g is the acceleration due to gravity [tex](9.8 m/s^2)[/tex]. Plugging in d = 1m and g = [tex]9.8$ m/s^2[/tex], we find that the time it takes to travel the first 1 m is
[tex]$t = \sqrt{\frac{2 \cdot 1}{9.8}} = \sqrt{\frac{2}{9.8}} \approx 0.449s[/tex]
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an athlete swims the length l of a pool in a time t 1and makes the return trip to the starting position in a time t 2. if she is swimming initially in the positive x direction, determine her average velocity for: the second half of swim g
The average velocity for the second half of the swim can be calculated is : v = d / t = l / t2
What is meant by average velocity?Change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs is called average velocity.
To determine the average velocity of athlete for the second half of the swim, you need to know distance she covered and the time she took to cover it.
The distance covered in the second half of the swim is the length of the pool, l. The time taken for the second half of the swim is t2.
So, the average velocity for the second half of the swim can be calculated as follows:
v = d / t = l / t2
where d is the distance covered, t is the time taken, and v is the average velocity.
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a racer accelerates from rest at constant acceleration for 2 seconds and travels 25 meters. if they then accelerate at the same constant acceleration for an additional 8 seconds, what is their total distance traveled in meters over the entire 10 seconds?
Distance traveled in a given amount of time is equal to the average speed. utilizing the formula s=ut+21at2s=510+212102s=50+100=150m.
Why do we measure distance, exactly?By understanding how far an object is from us, we may calculate its actual size. It is possible to calculate the space that an object takes up in the sky. The actual size of an object can then be determined by taking into account its distance. The further away something is, the smaller it appears.
What is a meter example?A common metric length from around three feet, 3 inches is called a metre. This proves that in the metric system, a meter is a measuring unit. Objects up to one meter in length include yardsticks, baseball bats, and guitars. Distances in sporting events like run and swimming are also measured in meters.
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how many volts of electricity can a human withstand
A fair general rule is that if a shock reaches 2,700 volts or more, the victim frequently dies or sustains serious injuries. When the voltage reaches above 11,000 volts, a victim typically dies.
Could you withstand 10,000 volts?Electrical engineering professor at the University college San Diego, Dr. Michael S. Morse, says but while 10,000 volt can be lethal in some situations, it is also feasible that something could have 10,000 voltages behind it and yet be reasonably safe.
Which is more lethal, current or voltage?Personnel would never print and post warning signs warning of danger from high voltage if the voltage posed no threat. In general, the idea that "current kills" is true. Electric current is what causes cardiac fibrillation, muscle freezing, and tissue burning.
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An acronym for the Women’s Memorial Fund is _WMF_
Using NBA instead of National Basketball Association is an example of an acronymic sentence.
_FALSE_
"Every good boy does fine" for the notes on a scale
-_Acronymic Sentence-_
“FACE” for the correct order of notes on a musical scale
-_Acronymic abbreviation-_
- “NBA” for the National Basketball Association _"Basic acronym
Acronyms formed from phrases can create - D. All of the above
An acronym can only stand for a single word. FALSE
ROYGBIV is an --- B. Acronymic abbreviation.--
The first step in creating any acronym is to C
"Acronymic Abbreviation" “MVEMJSUN” for the planets closest to the sun
The Foundation's namesake, Dr. Martha Ripley, was an ardent supporter of expert medical treatment for both married and unmarried mothers and their newborns.
What is Women memorial fund?Since its founding in 1957, Ripley's grantmaking has focused on the welfare of women and children. Dr. Ripley was instrumental in starting the Minneapolis Maternity Hospital in 1886 and stayed involved in its issues until her death in 1912.
The facility, which was subsequently given the name Ripley Memorial Hospital, was the first in the city to establish a social services department, provide lessons on parenting and natural delivery, and allow young children to "room in" with their mothers.
The hospital's board decided to form the Ripley Memorial Foundation and donate the proceeds from the sale when it closed in 1956.
Therefore, The Foundation's namesake, Dr. Martha Ripley, was an ardent supporter of expert medical treatment for both married and unmarried mothers and their newborns.
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Calculate the kinetic energy and the velocity required for a 70kg pole vaulter to pass over a 5.0m high bar. Assume the vaulter’s centre of mass is initially 0.90m off the ground and reaches its maximum height at the level of the bar itself.
Answer:
Below
Explanation:
The vaulter's entire KE will be converted to PE to clear the bar (5-.9) = 4.1 m above the COM.
PE required = mgh = 70 ( 9.81)(4.1) = 2815.5 J
KE required will then be 2815.5 J
(As an aside: = 1/2 mv^2 = 2815.5 = 1/2 ( 70)(v^2) shows v = 9 m/s)
PLEASE HELP Red tape can be used to repair a broken tail light on a car. In one or two sentences explain how different colors of light are transmitted, reflected and absorbed by this kind of tape.
Answer:
When sunlight shines through an orange solution, the violet, blue and green wavelengths are absorbed. The other colors pass through. The transmitted light is the light we see, and it looks orange. Colored objects look the way they do because of reflected light.
Explanation:
why does the blind spot from the optic disc in either eye not result in a blind spot in the visual field?
With both eyes open, the blind spots are not perceived because the visual fields of the two eyes overlap. Indeed, even with one eye closed, the blind spot can be difficult to detect subjectively because of the ability of the brain to “fill in” or ignore the missing portion of the image.
What is the structure of eye ?The optically transparent aqueous humour, lens, and vitreous body are all enclosed by three coatings that make up the eye. The cornea and sclera make up the outermost coat, while the choroid, ciliary body, and iris make up the intermediate coat and, from the rear to the front, the major blood supply to the eye.
Due to the fact that both eyes' fields of vision overlap, the blind spot is ignored and does not result in a blind spot in the visual field. Additionally, even with one eye closed, the brain has the capacity to ignore or make up for the affected area.
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Electric potential is the amount of potential energy per unit of charge
Explanation:
Yes, that is correct. Electric potential is a measure of the electric potential energy per unit of electric charge at a certain point in an electric field. It is often denoted by the symbol V and is measured in volts (V).
a large piece of ice breaks loose from the roof of a chalet at a ski resort and slides across the snow-covered terrain. it passes over the top of a hill in a path that has the shape of the arc of a circle of radius r . what is the speed v of the piece of ice as it passes over the top of the hill if the normal force exerted on it at this point is half its weight?
The speed v of the piece of ice as it passes over the top of the hill if the normal force exerted on it at this point is half its weight is [tex]v= \sqrt{\dfrac{gr}{2}}[/tex].
During the sliding over the top of the hill, the forces acting upon the piece of ice are gravitational force, [tex]F_g[/tex] = mg toward the ground,
and centrifugal force is given by [tex]F_c = \dfrac{mv^2}{r}[/tex] acting from the ground,
so the total normal force exerted on it at this point (toward the ground) is half its weight, [tex]F_n = \dfrac{1}{2} mg[/tex].
Using the Newton's second law of motion,
[tex]\dfrac{1}{2} mg = mg - \dfrac{mv^2}{r}[/tex]
Solving this,
[tex]v= \sqrt{\dfrac{gr}{2}}[/tex]
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as electrons are passed down the etc associated with ps ii, they lose energy. what happens to this energy?
Electrons lose energy when they pass through the proteins that exist between PSII and PSI. This energy is utilised to transport hydrogen atoms from the stroma to the thylakoid lumen.
As soon as electrons are lost, each photosystem is replenished with electrons from another source. The PSII reactive center receives electrons from water, but the PSI reactive center fills with electrons flowing down the electron transport chain from her PSII.
Two electrons lost from photosystem II are replaced by water molecule fission. Breaking down water also releases hydrogen ions into the lumen. This contributes to a hydrogen ion gradient similar to that produced by mitochondrial electron transport. Electrons move via a succession of proteins from photosystem II. This electron transport system uses the energy of electrons to drive hydrogen ions into the interior of the thylakoid.
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