PHYSICS HIGH SCHOOL

An electric kettle. The input energy is 10 Joules. The useful output energy is heat 9Joules. Wasted energy is sound 1 Joules.​

Answers

Answer 1
Answer:

Answer:

Efficiency = 90 %

Wasted energy = 10 %

Explanation:

Since we have the input energy and useful output energy of the electric kettle, the only thing we are required to calculate here is its efficiency. This is gotten from

E = useful output energy/input energy × 100

E = 9/10 × 100 = 90 %

The percentage of wasted energy is

W = wasted energy/input energy × 100

W = 1/10 × 100

W = 10 %

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An explanation of your answer would be appreciated.

Answers

True because when a bar magnet or any magnet is cut in half they then start to have their own South and North Pole.

A body moving with a velocity of 20m/s begins to accelerate at 3 m/s 2 . How far does the body move in 3 seconds

Answers

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The atoms in a solid move about freely

Answers


No, not exactly.  They jiggle and tremble and vibrate a lot, but
they always basically stay in very nearly the same place.

It's like if you're allowed to go anywhere you want in your jail cell,
you wouldn't exactly call that "moving about freely".

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Answers

Answer:

12 meters

Explanation:

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Answers

What is the main fuel consumed in the core of a red giant?
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This is collection of quantitative data made by comparing a quantity with a standard unit. In science, the units are metric.

Answers

Its called a measurement

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