PHYSICS HIGH SCHOOL

Moving waves can be described either as a function of time or as a function ofa. amplitude.
b. frequency.
c. speed.
d. position.

Answers

Answer 1
Answer: a. amplitude. is the answer
Answer 2
Answer:

Final answer:

Moving waves can be described either as a function of time or as a function of d.position.

Explanation:

Moving waves can be described either as a function of time or as a function of position.

When described as a function of time, waves are represented by their amplitude and frequency. Amplitude is the maximum displacement of the wave from its equilibrium position, while frequency is the number of complete cycles of the wave occurring in one second.

When described as a function of position, waves are represented by their wavelength and speed. Wavelength is the distance between two consecutive points in a wave that are in phase, while speed is the rate at which the wave propagates through a medium.

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A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s .If the cart has an initial speed of of 2.0 m/s ,what's its final speed.
Can anyone help me with this question?

a car travels 50 kilometers West and 10 minutes. after reaching the destination the car troubles back to the starting point, again taking 5 minutes. What is the average velocity of the car

Answers

SPEED is

               (distance covered) / (time to cover the distance) .

The car's average SPEED is

                            (100 km)  /  (15min)

                      =     6-2/3 km per minute.


VELOCITY is  

             (distance and direction between start-point and end-point)
divided by
             (time to travel from start-point to end-point).

The car ended up at the starting point, so the distance between
stating-point and end-point is zero.

      Velocity  =  (zero) / (time to travel from start-point to end-point)

                    = Zero .

An object has a density of 0.755 g/mL. Its volume is 640 mL. What is its mass?

Answers

Answer:Density = 7.5 g/ml (By putting the given values.) [ The ratio of the mass to volume is the density, that's why the unit of the density is also the ratio of the unit of mass to the unit of volume. ] Hence, the density of the object is 7

Explanation: Google

What two things do you need to know to describe the velocity of an object?

Answers

By definition, we have that the speed of an object is given by:


v = (d)/(t)

Where,

d: distance [in units of length: meters, feet, miles]

t: time [in units of time: minutes, seconds, hours]

Therefore, knowing the distance traveled, and the time to travel this distance, we can know the speed of an object.

Then, since velocity is a vector, then we need the direction of the vector.

Therefore, the velocity vector can be written as:

v = |v|(cos(\alpha) i + sin(\alpha) j)

Answer:

two things you need to know to describe the velocity of an object are:

1) Magnitude (speed)

2) direction

The distance it traveled and the time that it took to travel that distance

Explain why It takes longer to heat a cinema to the same temperature as a house.
​

Answers

i think because a cinema is bigger than a house.

Water is made of two hydrogen atoms and one oxygen atom bonded together. Julia is describing how water undergoes a physical change when it boils. She says that the particles shift to be farther apart and that the oxygen and hydrogen separate. She also says that the total mass of the steam is the same as the initial water, and that heat energy was required to cause the change. She finishes her description by saying that the steam can be turned back into water if it is cooled.what was her mistake?

Answers

Answer:

atoms remain bonded to each other in physical changes.

Explanation:

Answer:

c

Explanation:

The acceleration due to gravity for an object on the surface of the Earth is g. The distance from the Earth to the Moon is roughly 60 RE, where RE is the radius of the Earth. What is the centripetal acceleration of the moon during its (roughly circular) revolution around the Earth

Answers

Answer:

The centripetal acceleration that the moon experiences will be almost equal to the gravitational force that the Earth does in the moon,

Now, remember these two things:

F = m*a

and Fg = G*M1*M2/r^2

the first equation says that the force applied to something is equal to the mass of the object times the acceleration.

The second equation is for the gravitational force, where G is a constant, M1 and M2 are the masses of both objects, in this case, the Earth and the moon, and r is the distance.

We know that the acceleration in the surface of the Earth is:

a = Fg/M2 = g = G*M1/(RE)^2

now, for the moon we will have:

a = G*M1/(60RE)^2 = (G*M1/(RE)^2) *(1/60^2)

Here the term in the left is equal to g, so we have:

(G*M1/(RE)^2) *(1/60^2) = g*(1/60^2)

So the centripetal acceleration of the moon is 60^2 = 3600 times smaller than g.
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