Question

questions,
VN
15
10
10,0)
(i) During which time intervals is the body moving with variable velocity?
(ii) What is the acceleration of the body during the interval 3 s to 5 s?
(iii) What is the displacement of the body in the last four seconds of its motion?
Question 6
[3]
(a) (i) Differentiate between the terms supersonic and ultrasonic.
(ii) State two uses of ultrasound.
[3]
(b) State three factors on which the speed of sound depends.
(c) The speed of sound in air is 320 ms 1 and in water it is 1600ms! It takes 2.5S [4]
for sound to reach a certain distance from the source placed in air.
(i) Find this distance.
(ii) How much time will it take for sound to travel the same distance when the
source is in water?​

Answer 1

Answer:

sorry but iam not abel to answer you.

Answer 2

Explanation:

• The temperature difference between daily maximum and minimum temperatures is known as the diurnal temperature range. The much-reported decrease in the diurnal temperature range has been said to be one of the “fingerprints” of human-induced global warming.