3 years ago

Two enery converrsation that take place when you warm a cup of cocoa in a microwave Oven

1 answer:

6 0

1). Electrical energy from the wall outlet is converted to microwave (radio) energy, and to a little bit of kinetic energy to spin the turntable. 2). Microwave energy is converted to thermal energy in the cocoa.

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The best and most correct answer among the choices provided by the question is the fourth choice. The phenomenon that Michael Faraday explored was electricity and magnetism. I hope my answer has come to your help. God bless and have a nice day ahead!

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A rotating water pump works by taking water in at one side of a rotating wheel, and expelling it from the other side. If a pump

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Answer:

Explanation:

initial angular velocity, ωo = 0 rad/s

angular acceleration, α = 30.5 rad/s²

time, t = 9 s

radius, r = 0.120 m

let the velocity is v after time 9 s.

Use first equation of motion for rotational motion

ω = ωo + αt

ω = 0 + 30.5 x 9

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A body travels 30m in 5s, 45m in 7s and then 65m in the last 5s. Find the average speed of the body

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We can find the average speed of the body by finding the total distance covered, and then dividing it by the total time of the motion.

The total distance covered is:
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while the total time of the motion is
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So, the average speed of the body is:
$v= \frac{S}{t}= \frac{140 m}{17 s}=8.24 m/s$

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