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Zolol [24]
4 years ago
6

Ignoring air resistance, if a 20 kg ball and a 400 kg crate were both dropped from the

Physics
1 answer:
masya89 [10]4 years ago
8 0
The crate’s acceleration is gravity= 9.81m/s^2
The ball’s acceleration is also gravity=9.81m/s^2


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When heat is added to or removed from a substance, it may change its state. What state will most likely result if heat is added
grandymaker [24]
D. Change into a Gas
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3 years ago
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a person hears an echo from the top of a tower , 2.2 second after the sound is produced.how far away is the tower from the perso
bekas [8.4K]

Answer:

730.4 m

Explanation:

The sound waves travels with a uniform motion (=constant velocity), therefore we can calculate the distance it travels using the formula:

d=vt

where

d is the distance

v is the speed of the sound wave

t is the time taken

In this problem we have:

v = 332 m/s is the speed of sound in air

t = 2.2 s is the time elapsed

Therefore, the distance between the tower and the person is

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3 years ago
A circuit contains a 1.5v battery and a bulb with a 3 ohms resistance, calculate the current of the circuit
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Answer:

0.5A

Explanation:

V=IR where V is 1.5V, R is 3 ohms

Hence 1. 5= I x 3

1.5/3 =I

I =0.5 A

Current is 0. 5 amperes

5 0
3 years ago
Calculate the initial (from rest) acceleration of a proton in a 5.00 x 10^6 N/C electric field (such as created by a research Va
julsineya [31]

Answer:

Acceleration of the proton will be equal to 4.79\times 10^{14}m/sec^2

Explanation:

We have given electric field E=5\times 10^6N/C

Mass of proton is equal to m=1.67\times 10^{-27}kg

And charge on proton is equal to e=1.6\times 10^{-19}C

Electrostatic force will be responsible for the motion of proton

Electrostatic force will be equal to F=qE=1.6\times 10^{-19}\times 5\times 10^6=8\times 10^{-13}N

According to newton law force on the proton will be equal to F = ma, here m is mass of proton and a is acceleration

This newton force will be equal to electrostatic force

So 1.67\times 10^{-27}\times a=8\times 10^{-13}

a=4.79\times 10^{14}m/sec^2

So acceleration of the proton will be equal to 4.79\times 10^{14}m/sec^2

5 0
3 years ago
A wire is stretched just to its breaking point by a force F . A longer wire made of the same material has the same diameter. The
ICE Princess25 [194]

Answer: No

Explanation:

The force F required is equal to the Force exerted in stretching the first material since conditions are the same

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