PHYSICS MIDDLE SCHOOL

What happens when you increase the amplitude of a sound? it makes the sound travel faster

it makes the sound louder

it increases the wavelength of the sound

it increases the frequency of the sound

Answers

Answer 1
Answer:

Answer:

It increases the wavelength of the sound and gets softer if the amplitude decreases

Explanation:

And can i have brainlist??
Answer 2
Answer: it makes the sound louder louder because the intensity of the sound increases

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The speedometer in a car gives gives the car's ____ speed

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A weight machine ____.A) Decreases the amount of input force required

B) reduces the amount of input work

C) changes the direction of the input force

D) increases the input distance

Answers

C) changes the direction of the input force

Explanation:

A weight machine measure the normal reaction of a body place on the machine.This means the force will have no acceleration. The body placed on the machine will thus exert the force due to gravity and the normal reaction will  act  in the opposite direction to it.

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Normal reaction :brainly.com/question/836102

Keywords : weight machine

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The gravitational attraction between two objects will what is the object move further apart

Answers

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How fast will a cart be moving if a force of 200 N is applied to a 50 kg cart for 10 sec?

Answers


Acceleration = (force) / (mass)

If there is no friction . . .

Acceleration = (200N) / (50 kg) = 4m/s²

Change in speed = (acceleration) x (time) = (4 m/s²) x (10 sec) = 40 m/s

Final speed = (speed of the cart before the force began) + (40 m/s more)

(That's about 89 mph faster than the cart was moving before the force started.)
I'm assuming that the cart starts from rest.

Initial velocity (vi): 0 m/s
Final velocity (vf): ?
Acceleration (a): ?
Force (F): 200 N
Mass (m): 50 kg
Time (t): 10 s

F= ma
200 N= (50kg)(a)
a= +4 m/s^2

a= (vf-vi)/t
+4 m/s^2= (vf - 0m/s)/10s
vf= 40 m/s

Answer: the cart will be moving 40 m/s.
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