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Sedbober [7]
3 years ago
13

James is planning a science fair project on sound waves. He places an alarm inside a jar which he can remove the

Physics
1 answer:
ss7ja [257]3 years ago
7 0

Answer:

D

Explanation:

this is simple, because when air is removed, means that there is no particles in the jar so vacuum is achieved, and when you can't hear a sound means that the sound couldn't travel through the vacuum. which means that sound cannot travel through vacuum,

as a result, sound requires a medium ( air) travel from one point to another.

hope it helps, if not please report it so that someone else gets to try it

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One of the world's largest Ferris wheels, the Cosmo Clock 21 with a radius of 50.0 m is located in Yokohama City, Japan. Each of
STatiana [176]

Answer:

a = 0.55 m / s²

Explanation:

The centripetal acceleration is given by the relation

         a = v² / r

angular and linear velocities are related

         v = w r

we substitute

          a = w² r

In the exercise they indicate the angular velocity w = 1 rev/min, let's reduce to the SI system

          w = 1 rev / min (2pi rad / 1rev) (1min / 60s) = 0.105 rad/ s

let's calculate

          a = 0.105² 50.0

          a = 0.55 m / s²

4 0
3 years ago
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timama [110]

Answer:

20.7N

Explanation:

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3 0
3 years ago
Describe the interaction with the sun and producers
bagirrra123 [75]

Answer: the sun's rays is one of the raw Materials recquired by plants to make food

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4 0
3 years ago
A sprinter moving at 10 m/s slows down at a rate of 1.4 m/s2. how fast is the runner moving after 4 seconds?
AURORKA [14]
V=u+at
v=10+(-1.4 (4))
=10-5.6
=4.4m/s
3 0
3 years ago
Read 2 more answers
the distance between two points P and Q is 120 m a object goes from point P to q and then returned to P in 1 minute 40 second wh
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Answer:

using a formula

average velocity=total displacement/total time

average velocity=120/1minute40sec

1minute=60sec

60sec+40sec=120sec

average velocity=120m/120sec

average velocity=1m/sec

3 0
2 years ago
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