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horrorfan [7]
2 years ago
13

What is the length of an aluminum rod at 65°C if its length at 15°C is 1.2 meters?

Physics
2 answers:
lana66690 [7]2 years ago
3 0

<em><u>Answer:</u></em>

The new length is 1.20138 m

<em><u>Explanation:</u></em>

<u>1- We get the increase in length:</u>

The old length = 1.2 m

The coefficient of expansion of of aluminum is 23 * 10⁻⁶ /K.

The old temperature is 15°C.

The new temperature is 65°C

The increase in length= old length * coefficient of expansion *change in temperature

The increase in length = 1.2 * 23 * 10⁻⁶ * (65-15)

The increase in length = 0.00138 m

<u>2- getting the new length:</u>

new length = old length + increase in length

new length = 1.2 + 0.00138

new length = 1.20138 m

Hope this helps :)

Radda [10]2 years ago
3 0
<span>1.201386 meters at 65 degrees C.      
 Will be your answer!

Hope I Helped!</span>
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Suppose you wanted to hold up an electron against the force of gravity by the attraction of a fixed proton some distance above i
SCORPION-xisa [38]

Answer:

The value is  r =  5.077 \  m

Explanation:

From the question we are told that

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   The  charge on the electron/proton  is  e =  1.6*10^{-19} \  C

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Generally for the electron to be held up by the force gravity

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       Electric force on the electron  =  The  gravitational Force

i.e  

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7 0
3 years ago
what is the momentum of a child and a wagon if the total mass of the child and wagon is 22kg and the velocity is 1.5m/s?
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Answer:

33 kg m/s

Explanation:

The momentum of an object is given by:

p=mv

where

m is the mass of the object

v is the velocity of the object

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Answer:

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(B) s = 146.664 m

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