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AnnZ [28]
3 years ago
14

You can feel the heat waves from a small electric heater on your hands and face even though the heater is on the other side of t

he room. Which is this is an example of?
Physics
1 answer:
NeX [460]3 years ago
8 0
That's an example of heat transfer by radiation.
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Children are sled riding on a hill One little girl pulls her sled back up the hill and does 379.5 joules of work while pulling i
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Answer:

2.2N

Explanation:

Given parameters:

Work done  = 379.5J

Height  = 173m

Unknown:

Amount of force exerted on the sled  = ?

Solution:

The amount of force she exerted on the sled is the same as her weight.

Work done is the force applied to move a body through a distance.

      Work done  = mgh

m is the mass

g is the acceleration due to gravity

h is the height

     mg  = weight;

        Work done  = weight x h

           379.5 = weight  x  173

           weight  = \frac{379.5}{173}   = 2.2N

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Answer:

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Explanation:

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