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Lemur [1.5K]
3 years ago
9

If a conductor wire gets heated. What happens with its resistance?

Physics
1 answer:
yawa3891 [41]3 years ago
4 0
If a conductor wire is heated, its resistance decreases and conductivity increases.
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A 60-kg runner raises his center of mass approximately 0.5 m with each step. Although his leg muscles act as a spring, recapturi
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Answer: P = 36.75W

The additional power needed to account for the loss is 36.75W.

Explanation:

Given;

Mass of the runner m= 60 kg

Height of the centre of gravity h= 0.5m

Acceleration due to gravity g= 9.8m/s

The potential energy of the body for each step is;

P.E = mgh

P.E = 60 × 9.8 × 0.5

PE = 294J

Since the average loss per compression on the leg is 10%.

Energy loss = 10% (P.E)

E = 10% of 294J

E = 29.4J

To calculate the runner's additional power

given that time per stride is = 0.8s

Power P = Energy/time

P = E/t

P = 29.4J/0.8s

P = 36.75W

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The sun, like all stars, releases energy through nuclear fusion. In this problem, you will find the total number of fusion react
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Using E= mc²

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Which skill will help you be able to move around other players in a soccer game?
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How does a decrease in thermal energy affect the kinetic energy of the particles in each state of matter?
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