Question

Question 10
[A] The diagram shows a convex mirror. C is its centre of
curvature and F is its focus.
[3]
(i) Draw two rays from A and hence locate the
position of image of object OA. Label the image
IB.
(ii) State three characteristics of the image.
[B] The speed of sound in air is 330 ms-1
and in water is 1650 ms-1
. It takes 3 s for sound to reach a certain
distance from the source placed in air:
[3]
(i) Find the distance,
(ii) How much time will it take for sound to reach the same distance when the source is in water?
[C] Answer the following: [4]
(i) Draw displacement-time graph of a wave and show on it the amplitude and time period of wave.
(ii) Distinguish between mass and weight

Answer 1

Answer:

The diagram above in figure shows a convex mirror . C is its center of curvature and F is its focus. (i) Draw two rays from A and hence locate the position of image of object OA. Label the image IB. (ii) State three characteristics of the image.