Question

answer this question with clear explanation please explain​

Answer 1

Answer:

6. Distance between source and reflecting surface will be :

The sound travels from source to reflector and again from reflector back to source , so distance travelled is twice the actual distance.

$\boxed{ \bold{d = \dfrac{v \times t}{2} }}$

7. Work done in this case is the amount of energy spent for changing the location of the body from height h1 to h2 against Gravitational acceleration.

$\boxed{ \bold{w = mg(h2 - h1)}}$

8. Focal length f , object distance u and image distance v ia related by lens formula as :

$\boxed{ \bold{ \dfrac{1}{f} = \dfrac{1}{v} + \dfrac{1}{u} }}$

9. Power is defined as the rate of doing work, in other words , it's the ratio of work done to the time taken.

$\boxed{ \bold{p = \dfrac{w}{t} }}$

10. Acceleration due to gravity is 1/6 the as compared to gravity on Earth , hence weight of objects on moon will also be 1/6 times as that of Earth.

$\boxed{ \bold{ \frac{1}{6} \times (weight \: on \: earth)}}$