3 years ago

What two factors affect the speed of a sound wave as it travels through a medium ?

Physics

1 answer:

iragen [17]3 years ago

6 0

The material that makes up the medium such as air or water and the temperature.

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A double star has two components of equal brightness, each with a magnitude of 8.34. if these stars are so close together that t

lesya692 [45]

Assuming that the magnitude is additive, then you simply have to add the brightness four times. This is because each star has 2 magnitudes of 8.34. As a result, you have to add 4 magnitudes of 8.34. The solution is as follows:

Magnitude = 4(8.34)
Magnitude = 33.36

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3 years ago

A ball of mass 0.05 kg strikes a smooth wall normally four times in 2 second with a velocity of 10m/s. Each time the ball reboun

asambeis [7]

Answer" The average force on the wall be equal to 0.5 N.

Explanation:

To calculate the average force on the wall, we use the following equation:

$Ft=m\Delta v\\\\F=\frac{m(v_2-v_1)}{t}$

where,

F = average force = ?N

m = mass of the ball = 0.05kg

$v_1$ = Initial velocity of the ball = -10m/s (negative sign because the ball rebounds)

$v_2$ = Final velocity of the ball = 10m/s

t = time taken by the ball = 2s

Putting values in above equation, we get:

$F=\frac{0.05kg[10-(-10)]m/s}{2s}\\\\F=\frac{0.05kg(20m/s)}{2s}\\\\F=0.5kgm/s^2=0.5N$

Hence, the average force on the wall will be equal to 0.5N.

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3 years ago

If a group of workers can apply a force of 1000 newtons to move a crate 20.0 meters on a frictionless ramp: How high up a ramp w

Oksi-84 [34.3K]

That's going to depend on the mass of the crate. They'll be able to push a crate full of pingpong balls really high, but they may not be able to even budge the crate at all if it's full of bricks.

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3 years ago

If I have an object that starts from rest and reaches a velocity of 25m/s over a distance of 11m what is the acceleration of the

Elodia [21]

Answer:

Here is something that may help you!!

Explanation:

I found it in a cite (not that I'm plagiarizing, or anything).