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julsineya [31]
3 years ago
6

PLEASE HURRY

Physics
1 answer:
Vikentia [17]3 years ago
8 0

Answer: B superconductors

Explanation:

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How does a parallel circuit change when a branch is added?
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In a loading a lorry a man lifts boxes each weight 200N through a height of 3.5m.
vekshin1

The work done on the boxes and the energy spent is 700J while the power required to lift 4 boxes per minute is 2.8kW

This work done on an object is the force required to move that object from point A to point B.

Data Given;

  • Weight (mg) = 200N
  • Distance (s) = 3.5m
<h3>Work Done</h3>

This is the work done to move the boxes from point A to point B.

w = F.s\\F = ma = mg = 200N\\w = 200 * 3.5\\w = 700J

The work done to move the object is 700J

<h3>Energy</h3>

This is used to calculated the energy used to carry the work done and the formula is given as

E = force * displacement\\E = F.s\\E = 200 * 3.5\\E = 700J

The energy transferred when he lifts one box is 700J

<h3>Power</h3>

Power is the rate at which energy is used with respect to time

P = E/t\\

The energy required to lift 4 boxes in one minutes is

700 * 4 = 2800

Now we can calculate the power used

P = Energy / time\\P = 2800 / 1 \\P = 2800W = 2.8kW

The power required to move four boxes in 1 minutes is 2.8kW

From the calculations above, the following was gotten

  • work done = 700J
  • Energy = 700J
  • Power = 2800W or 2.8kW

Learn more on work done, energy and power here;

brainly.com/question/10063455

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Charlotte throws a paper airplane into the air, and it lands on the ground. Which best explains why this is an example of projec
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