When hurled at an angle to the horizontal, a projectile can only rise to a height that is half its horizontal range. The length of a ball is represented by the equation h(t)=-16t+48t+160, where T is the launch time.
Is 0 always the highest point?Any projectile that reaches its maximum height has zero instantaneous speed. Because gravity provides the ball a same velocity on the way up (slowing) as on the way down, the time required for the ball to travel to its highest point and return to its launch position is equal (speeding it up).
How do you determine a function's maximum and lowest height?The vertex, which is a maximum (or lowest) in a parabola, can be located by solving the square (yuck!) or by using the formula x = -b/2a. By adding this x value back into the previous equation, which corresponds to the vertex's x, we may get the associated maximum height.
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a lunar eclipse can occur only atgroup of answer choicesfirst quarter moon.third quarter moon.new moon.full moon.
An lunar eclipse can only happen at certain response options.New moon is the first quarter moon.
What three lunar eclipses are there?A lunar eclipse happens when Earth passes in front of the Sun and Moon, preventing the Amount of solar radiation from striking the Moon directly.Only at full moons do lunar eclipses take place.Total, partial, & penumbral lunar eclipses are the three types that can occur.
Can the q3 moon create an eclipse?The Moon's shadow, which it casts across the Earth whenever it is directly between the Sun and the planet, causes a solar eclipse.Solar eclipses can only happen with a new moon.
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is there any other position where the electric field magnitude is zero? if so, what is that location in terms of d ?
No, the electric field magnitude is zero only at the midpoint between the two charges, i.e. at a distance of d/2.
In order to determine the location of the electric field zero, we set the electric fields for each point charge to be equal to one another because that is the point at which they will cancel one another out. The electric potential does not necessarily equal zero just because the electric field is zero at a certain location. The situation of two similar charges that are spread apart is an excellent example. Even when the electric field is not zero at a given point, the electric potential can nonetheless be zero there. Because it is 0 at a point inside the solid body of the conductor, the electric field caused by induced charges at the sphere's center is zero.
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multiple choice question a point charge q is enclosed by a gaussian surface in the shape of a pyramid with sides of length l. what is the total electric flux through the pyramid?
A radius R Gaussian spherical surface encloses a charge Q. The electric flux will increase when the radius is doubled. either a) stay the same; or b) multiply by four.
An electric charge is what?
When retained in an electromagnetic field, stuff with an electric charge experiences a force according to its physical nature. The 2 types of electric charges—positive and negative—that protons and electrons most frequently carry are positive and negative. An object is considered neutral when its net charge is equal to zero.
What does charge in science mean?
Discover the meaning of charge in science. Charge often refers to electric charge in chemistry and physics, which is a conserved feature of some subatomic particles that governs their electromagnetic interaction. An electromagnetic field exerts a force on matter as a result of the physical attribute of charge.
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GCSE Physics question
The period of the sound wave is 0.00025 second.
What are acoustic waves?An example of an energy type that propagates through a medium using adiabatic loading and unloading is acoustic waves. Acoustic pressure, particle velocity, particle displacement, and acoustic intensity are crucial parameters for defining acoustic waves.
Given parameters:
Frequency of sound wave is = 4.0 kHz
We know that for wave motion:
Time period of the wave = 1/frequency of the wave
Hence, The period of the wave is = 1/Frequency
= 1/ (4 × 10³) second
= 0.00025 second.
So, the period of the wave is 0.00025 second.
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if the mass of io were to somehow double, but its distance from jupiter were unchanged, what would happen to its period? explain.
The period of a celestial object in orbit around a planet is defined by the planet's mass and the celestial object's distance from the planet. If Io's mass doubles while its distance from Jupiter remains constant, its period will remain constant.
What is distance?The quantity or size of displacement between two places is defined as distance. It is important to note that the distance between two points is not the same as the distance traveled between them. The total length of the path traveled between two points is referred to as the distance traveled.
Here,
This is because the period is related to the square root of the planet's mass divided by the celestial object's distance from the planet. Doubling Io's mass results in a corresponding increase in Jupiter's mass, but the distance between Io and Jupiter remains constant, resulting in no change in the period.
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Calculate the force of gravity on a 55 kg person on the surface of the earth.
Answer:
539 N
Explanation:
The force of gravity (also known as weight) on an object can be calculated using the formula:
F = m * g
where F is the force of gravity, m is the mass of the object, and g is the acceleration due to gravity.
For a 55 kg person on the surface of the earth, the acceleration due to gravity is approximately 9.8 m/s^2. Therefore, the force of gravity can be calculated as:
F = 55 kg * 9.8 m/s^2 = 539 N
So, the force of gravity on a 55 kg person on the surface of the earth is approximately 539 N.
there is evidence that elephants communicate via infrasound, generating rumbling vocalizations as low as 14 hz that can travel up to 10 km. the intensity level of these sounds can reach 100 db, measured a distance of 5.5 m from the source. determine the intensity level of the infrasound 10 km from the source, assuming the sound energy radiates uniformly in all directions.
The intensity level of the infrasound 10 km from the source is 62.41 dB.
Describe infrasound.Low-status sound refers to sound waves having a frequency below the threshold of human audibility, also known as infrasound (generally 20 Hz). Hearing increasingly becomes less sensitive as frequency decreases, hence infrasound needs to have a powerful enough sound pressure for people to be able to hear it. Although many parts of the body may be able to detect infrasound vibrations at higher frequencies, the ear is the primary organ for hearing low-frequency sounds.
There are some uses for the term "infrasonics," which examines sound waves below 20 Hz and up to 0.1 Hz (and rarely to 0.001 Hz). Monitoring earthquakes and volcanoes, as well as mapping underground rock and petroleum deposits, are all done in this frequency range.
The intensity level of a sound decreases with the square of the distance from the source. So, the intensity of the infrasound 10 km from the source will be:
100 dB - 20 log (10 km / 5.5 m)
= 100 dB - 20 log (1818.1818)
= 100 dB - 37.59 dB
= 62.41 dB
So, the intensity level of the infrasound 10 km from the source is 62.41 dB.
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in this situation, how far from the positive charges (a finite distance from them) is the location where the net electric field is zero? m
The location where the net electric field is zero is not a finite distance from the positive charges in this situation. The electric field due to each positive charge points radially away from the charge and the electric field due to the negative charge points radially towards it.
The net electric field is the vector sum of the electric fields due to all the charges, and it will not be zero anywhere in space since the positive charges and negative charge are not symmetrically placed.
The electric field at any point in space is defined as the force per unit charge experienced by a test charge placed at that point. In the given situation, the electric field due to the four positive charges will point radially away from the charges and will have a magnitude that decreases with increasing distance from the charges. The electric field due to the negative charge will point radially towards it and will have a magnitude that also decreases with increasing distance from the charge.
When these electric fields are combined to form the net electric field, the resulting field will not be zero anywhere in space since the positive charges and negative charge are not symmetrically placed. This means that if a test charge were placed at any point in space, it would experience a net force due to the electric fields.
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The complete question is:
Set up a situation in which you have four positive charges placed on top of each other at one location, and then a single negative charge 1 m away from the positives.
a. In this situation, how far from the positive charges (a finite distance from them) is the location where the net electric field is zero? _______ m
an astronaut has left the international space station to test a new space scooter. her partner measures the following velocity changes, each taking place in a 12 s interval. what is the average acceleration in each interval? assume that the positive direction is to the right.
The average acceleration in each interval is 0.922 [tex]\frac{m}{s^{2} }[/tex], 0.922 [tex]\frac{m}{s^{2} }[/tex]
and 2.922 [tex]\frac{m}{s^{2} }[/tex].
a) for the acceleration of astronaut
Acceleration is like the angry, fire-breathing dragon of motion variables in comparison to displacement and velocity. It can be dangerous, some people find it frightening, and if it's large, it makes you pay attention. You can feel yourself accelerating in scenarios like sitting in a plane during takeoff, slamming on the brakes in a car, or speeding around a corner in a go-kart.
acceleration of astronaut = change in velocity/time
acceleration of astronaut = [tex]\frac{5.5-15}{10.3}[/tex]
acceleration of astronaut = - 0.922 [tex]\frac{m}{s^{2} }[/tex]
acceleration of astronaut is 0.922 [tex]\frac{m}{s^{2} }[/tex]to left
b)acceleration of astronaut = change in velocity/time
acceleration of astronaut =[tex]\frac{-15-(-5.5)}{10.3}[/tex]
acceleration of astronaut = - 0.922 [tex]\frac{m}{s^{2} }[/tex]
acceleration of astronaut is0.922 [tex]\frac{m}{s^{2} }[/tex]o left
c)acceleration of astronaut = change in velocity/time
acceleration of astronaut =[tex]\frac{-15-15}{10.3}[/tex]
acceleration of astronaut = - 2.922 [tex]\frac{m}{s^{2} }[/tex]
acceleration of astronaut is 2.922 [tex]\frac{m}{s^{2} }[/tex] to left
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A new kind of toy ball is advertised to ""bounce perfectly elastically"" off hard surfaces
A toy ball that is advertised to "bounce perfectly elastically" off hard surfaces means that the ball will rebound from a surface with the same energy it had before it hit the surface. In other words, the ball will lose no energy due to inelastic deformation.
What is the term elasticity mean?Elasticity is a property of materials that refers to their ability to return to their original shape after being deformed by an applied force. When a material is deformed elastically, it experiences a restoring force that is proportional to the magnitude of the deformation.
How to find elasticity of any object?The elasticity of an object can be determined experimentally by applying a force to the object and measuring the resulting deformation. There are several methods for doing this, depending on the type of object and the conditions under which it is tested.
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a wheel rotates 3 times. what is its angular displacement? 8) if a 30 cm radius wheel rotates through 3 radians how far has it rolled? 9) what is the angular displacement of the minute hand on a clock during a 30 minute interval. 10) three hours pass by. what is the angular displacement of the hour hand on the clock during this interval?
The hour hand's angular displacement is 360 degrees in 12 hours, or 30 degrees each hour.
What is angular displacement example?The angle made by the body from its point of rest at any point in the rotational motion is the angular displacement. For example- If a dancer dancing around a pole does one full rotation, his or her angular rotation will be 360°. On the other hand, he or she makes half a rotation; the displacement will be 180°.
What is displacement answer?The word displacement implies that an object has moved, or has been displaced. Displacement is defined to be the change in position of an object.
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PLS HELP ME
a bullet is fired with a velocity of 150m/s at an angle of 15° to the horizontal.Calculate the range of the bullet (g=10m/s)
The range of the bullet is 1,125 m.
What is the range of bullet?The range of the bullet is the maximum horizontal distance travelled by a projectile and it can be calculated by applying the following formula.
R = ( u² sin ( 2θ ) / g
where;
u is the initial velocity of the bullet = 150 m/sθ is the angle of projection of the bullet = 15°g is the acceleration due to gravity = 10 m/s²The range of the bullet is calculated as follows;
R = ( u² sin ( 2θ ) / g
R = ( 150² sin ( 2 x 15 ) / 10
R = 1,125 m
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you are snowboarding down a hill at 17 m/s when you start sliding across a frozen lake. the frictional force slowing you down is 22 n. if your mass is 75 kg, how far do you slide?
The statement "The normal Force on an item is equal towards its mass m 75" must appear on every page of this textbook if it is being redistributed in print.
What is a good illustration of physical force?of destructive physical forces include those that are swift and catastrophic, including both catastrophic event and operator mistakes (such as seismic events, or rocking or falling an object), as well as those that are slower acting with a small but frequent chance for destruction (such like improper handling during studies and educational use).
What does the Force symbolize?The Force is a symbolism for godhood, says Jennifer Porter, a professor of religious sciences at Memorial University in Newfoundland, "that connects and inspires [people] to have a deeper devotion to the godhood defined."
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to push a car down the street, a truck applies 20,400 j of work over 60 seconds. calculate the power to push the car.
340 W is the power to push the car if a car down the street, a truck applies 20,400 j of work over 60 seconds.
Power is defined as the rate at which work is done. It is given by the equation:
P = W / t
where P is power, W is work, and t is time.
Given that the truck applies 20,400 J of work over 60 seconds, the power can be calculated as:
P = W / t = 20,400 J / 60 s = 340 W
So the power required to push the car down the street is 340 W.
The rate of work execution is referred to as power. The equation states it as follows: 340 W is the power to push the car if a car down the street, a truck applies 20,400 j of work over 60 seconds.
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a baseball is hit at ground level. the ball is observed to reach its maximum height above ground level 3.0 seconds after being hit. and 2.5 seconds after reaching this maximum height, the ball is observed to barely clear a fence that is 320 ft. from where it was hit. how high is the fence? (the acceleration of gravity is -32.2 ft/s 2 .)
To find the height of the fence, we need to find the final height of the ball after it was hit and then subtract the height of the fence.The final height of the ball can be found using kinematic equations. Using the initial velocity, acceleration due to gravity, and time elapsed, we can find the final height of the ball:h = vi * t + 0.5 * a * t^2whereh = final height
vi = initial velocity (0, since it was hit from ground level)
t = time elapsed (3.0 s)
a = acceleration due to gravity (-32.2 ft/s^2)Substituting the values,h = 0 + 0.5 * -32.2 * (3.0)^2 = 45.3 ftNext, we need to find the height of the ball 2.5 seconds after it reached its maximum height.Using the same kinematic equation,h = vi * t + 0.5 * a * t^2whereh = final height
vi = initial velocity (0, since it was at its maximum height)
t = time elapsed (2.5 s)
a = acceleration due to gravity (-32.2 ft/s^2)Substituting the values,h = 0 + 0.5 * -32.2 * (2.5)^2 = 18.825 ftFinally, subtracting the final height of the ball from the height of the fence:fence height = 320 ft - 18.825 ft = 301.175 ftSo, the fence is 301.175 ft high
if two adjacent frequencies of an organ pipe closed at one end are 550 hz and 650 hz, what is the length of the organ pipe? (vsound
The length of an organ pipe can be calculated using the formula:
L = v / (2f)
where L is the length of the pipe, v is the speed of sound in air, and f is the frequency of the pipe. To find the length of the pipe, we can use the average of the two frequencies as the frequency of the pipe:
f = (550 Hz + 650 Hz ) / 2 = 600 Hz
Assuming the speed of sound in air is approximately 340 m/s:
L = v / (2f) = 340 / (2 * 600) = 0.057 m
So, the length of the organ pipe is approximately 0.057 meters.
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one day while measuring acceleration with his pulse as a timing source, galileo became so excited that his pulse rate increased. his results for acceleration that day were probably
Galileo once felt so thrilled as his pulse rate went up while he was using his pulses as a time source to measure acceleration. He probably had better acceleration results that day.
How does acceleration function? What is it?
Any procedure where the velocity varies is referred to as acceleration. There are just two ways to accelerate: changing your speed or changing your direction, or changing both. This is because velocity is both a rate and a direction.
Is acceleration accelerating or constant?
An object is considered to be moving faster or to have an acceleration if its velocity changes. An item can occasionally alter its speed by the same quantity every time or every second. Because the speed is changing by a fixed amount every second, this is therefore known as acceleration, which is constant.
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for a scene in an action movie, a car drives at 25.0 m/s directly toward a wall. the car's horn is on continuously and produces a sound of frequency 415 hz . if the speed of sound is 340 m/s and the air is still, what is the frequency of the sound that the driver of the car hears reflected from the wall?
The frequency of the sound that the driver hears reflected from the wall is approximately 472.56 Hz.
To find the frequency of the sound that the driver of the car hears reflected from the wall, we need to consider the Doppler effect.
The frequency of the sound will change due to the relative velocity of the car and the sound wave.
Let f be the frequency the driver hears reflected from the wall.
Then, we can use the equation:
f = f0 * (v + vs) / (v + vr)
where f0 is the original frequency of the horn,
vs is the speed of sound, and
vr is the relative velocity of the car and the sound wave.
In this case, f0 = 415 Hz, vs = 340 m/s, and vr = 25 m/s (the car is moving toward the wall).
Plugging these values in, we get:
f = 415 * (340 + 25) / (340 - 25)
f = 415 * 365 / 315
f = 472.56 Hz
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Walter Cannon criticized the James-Lange theory on multiple points. Which one of the following is one of those criticisms?
Explanation:
Walter Cannon challenged the James-Lange theory, criticizing it on several grounds. Which of the following is one of those criticisms? Cannon pointed out that bodily reactions are similar for many emotions, yet our subjective experience of various emotions is very different.
A closed system can exchange:
(A) matter with the surroundings
(B) energy with the surroundings
(C) both A and B
(D) none of the above
the quantity that has units is known as a multiple choice horsepower. joule. newton. watt.
Joule is a measure of quantity with units kgm²/s² (option 2)
A physical quantity is anything that can be measured in the physical world. A table's length, for instance, can be measured. In this case, length is a numerical value. Your body's mass can be measured because it is a physical quantity. Time is a physical quantity, thus you can quantify the amount of time you are spending reading this book.
The International System of Units uses the joule as its unit of energy. It is equivalent to the amount of work that is accomplished when a mass is displaced by a force of one newton over a distance of one meter in the direction of the force applied.
International system base unit is kgm²/s².
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3. the coefficient of friction between a soccer ball and a court is 0.52, and its mass is 425 gm. how much horizontal force is required to make the shoe slide?
The horizontal force that is required to make the shoe slide is 2.1658N.
Horizontal force = static friction
Static friction = uMg
u is coefficient of friction
g = acceleration due to gravity
M is the mass of the body that is .0425 kg.
Force required = (0.52 x 0.425 x 9.8) N
= 2.1658N
A horizontal force is a force that operates in a direction parallel to the horizon. The cycle's speed tends to slow down due to an opposing force called air resistance force, which acts in the opposite direction. Both the applied force and the air resistance force are considered horizontal forces when the direction is taken into account. Jumps and horizontal medicine ball throws can help increase the horizontal force produced. The Standing Long Jump, Standing Triple Jump, and horizontal jumps over hurdles or boxes are some of these jumps.
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You have a system of a negatively charged object and a positively charged object separated by some arbitrary finite distance.1. What is the sign of their potential energy? (Remember that charges that are infinitely far from each other have zero potential energy.)2. What can you do to decrease this energy?3. Draw an energy bar chart for this process of decreasing the energy.
The sign of the potential energy of a system of two charged objects depends on the nature of the charges. In the case of a negatively charged object and a positively charged object separated by some finite distance, the potential energy is negative, meaning that energy is stored in the system.
What can you do to decrease this energy?To decrease the potential energy of the system, you can bring the charged objects closer together, reducing the distance between them. This reduces the electric field strength and the potential energy stored in the system.
What happens when charges get closer?As the charges get closer, the repulsive force between them increases, requiring more work to overcome. At some point, the charges will repel each other so strongly that it becomes difficult to bring them any closer together.
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if two such generic humans each carried 1.0 c coulomb of excess charge, one positive and one negative, how far apart would they have to be for the electric attraction between them to equal their 650 n weight? express your answer in kilometers.
The required distance between the two charges is r ≈ 0.098 km.
How to use Coulomb law to find distance between charges?The force of attraction between two point charges is given by Coulomb's law:
F = k * q1 * q2 / r^2
where
F is the force of attraction (in N)
k is the Coulomb constant (8.987551787 x 10^9 Nm^2/C^2)
q1 and q2 are the magnitudes of the charges (in C)
r is the separation between the charges (in meters)
Setting the force equal to the weight (650 N) and solving for r, we get:
According to question:650 = k * 1.0 C * 1.0 C / r^2
r = [tex]\sqrt{\frac{k * 1.0 C * 1.0 C}{650N} }[/tex]
Converting r to kilometers:
r = √(k * 1.0 C * 1.0 C / 650 N) / 1000 m/km
r = √(8.987551787 x 10^9 Nm^2/C^2 * 1.0 C * 1.0 C / 650 N) / 1000 m/km
r ≈ 0.098 km
So the two charges would have to be approximately 0.098 km apart for the electric attraction between them to equal their 650 N weight.
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show answer no attempt 50% part (a) what type of wave is created through a battering ram when it hits a wall?
When a battering ram strikes a wall, it creates a type of mechanical wave known as a pressure wave or a shock wave.
Pressure waves are created by the transfer of energy through a medium, such as a wall or the air, as a result of a sudden change in pressure. The energy from the battering ram creates a compression wave that moves out from the point of impact and spreads throughout the medium. This type of wave is different from transverse waves, such as light or radio waves, which move perpendicular to the direction of the wave's motion, or longitudinal waves, such as sound waves, which move parallel to the direction of the wave's motion. The pressure wave created by the battering ram is an example of a longitudinal wave that moves through the medium, transmitting the energy from the ram to the wall.
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my flashlight normally gives off 100 units of light and i do not notice that it is getting dimmer until it gets to 95 units. what is the jnd?
Batteries are underpowered or dead. The power released by batteries decreases with time, causing most flashlights' illumination to gradually dim until turning out totally.
When you turn on the torch, why does it emit light?The tungsten filaments or LED in the lamp starts to glow when electricity turns it on, emitting visible light. The lamp's reflector, which is positioned around it, reflects this light.
My rechargeable torch won't charge; why?To be sure that no debris or grime is blocking the flashlight from charging, check the USB port. To test if a fresh battery will help, try using the flashlight. Use a fresh charging cable or adapter to.
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a ferris wheel with a radius of 10.0 m makes 1 revolution every 10 s. when a passenger is at the top, essentially a diameter above the ground, he releases a ball. how far from the point on the ground directly under the release point does the ball land?
The ball will land 12.3 meters away from the point on the ground directly under the release point. This can be expressed mathematically as:
The radius of the wheel is 10.0 m, so the diameter of the wheel will be 20.0 m. the circumference of the wheel can be calculated as follows.
[tex]C=2\pi r\ \\ =(2\pi )(10m)\\ =62.831m[/tex]
The speed of any point of the wheel can be determined as
[tex]v=C/t \\\=62.831m/10s\\=6.283m/s[/tex]
Now, the following formula can be used to determine how long it takes the ball to move vertically a distance equal to the wheel's diameter.
[tex]s=ut+1/2gt^{2} \\ where, u = initial speed = 0 \\So,\\(20.0m)=(0)t+1/2(9.8m/s^{2} )t^{2} \\t^{2} = (20m)(2)/(9.8m/s^{2} )\\t=2.01s\\[/tex]
The ball will now touch the ground at this moment. The following formula can be used to determine how far the point traveled during this period.
[tex]D=(6.283m/s)(4.081s)\\\\=12.287m\\=12.3m[/tex]
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What is the name of a change that occurs when one or more substances change into entirely new substances with different properties?
A chemical change is the transformation of one substance into another, the emergence of new compounds with distinct properties, or any combination of these. It happens when two compounds mix to create a new material (synthesis or either decomposes to form more substances).
What is substance and example?A substance is defined as matter with a certain composition and particular qualities. Everything that is pure is a substance. A substance is every pure compound. Several chemicals are: Since iron is an element, it qualifies as a material. Methane is a substance since it is a compound.
What is a natural substance?Naturally Occurring Substances: Substances that exist in the environment naturally yet nonetheless pose a risk to businesses in terms of environmental responsibility. Examples include radon, pyrite, asbestos, mercury, arsenic, and asbestos. The majority of these materials are found while being developed or built.
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How many degrees of freedom does a simple solid have?
There are three degrees of freedom in a basic solid. Only translational (DOFs) are supported by solids at each node.
What is the formula for degrees of freedom?In statistics, df = N-1 is the equation that is most frequently used to calculate degrees of freedom. Use this number to find the equation's critical values in a mean value tables, which in turn establishes the results' statistical significance.
What does "degree of freedom" mean exactly?The largest number of operationally independent variables is, values with the freedom to change—in the data sample is referred to as the degree of freedom. If there is a remaining requirement for the data sample, particular data specimen items must be picked after the degrees of freedom amount has been decided.
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what is the primary form of useful energy output in the case of a car?