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kakasveta [241]
3 years ago
8

7. A stereo is able to convert 20% of its electrical energy into sound. If 1000 J of sound energy is produced, calculate the ele

ctrical energy used [Show all work].
8. A vehicle is only 18% efficient. How was the other 82% of the energy lost?
Physics
1 answer:
Sonja [21]3 years ago
3 0

Answer:

As 20/100 E= 1000

E= 10,000/2

=5000J

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sleet_krkn [62]

The final velocity will be 19 m/sec.Option C is correct.

<h3>What is velocity?</h3>

The change of displacement with respect to time is defined as the velocity.  

Velocity is a vector quantity. it is a time-based component. Velocity at any angle is resolved to get its component of x and y-direction.

From Newton's first equation of motion;

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The final velocity will be 19 m/sec

Hence, option C is correct.

To learn more about the velocity refer to the link ;

brainly.com/question/862972

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