5. If the speed of sound in air is 332m/sec and frequency is
What is its wave length? (Ans: 33.2m)
The speed of sound is 330m/s, its wavelength is3.3 mete
frequency? (Ans: 100Hz)
The wavelength of sound is 15m and its frequency is 10
its speed? (Ans: 1500m/s)
A man sitting nearby a cave of mountain hears the
his whistle in 0.25 second. How far is he from mou
v=332m/s). (Ans: 33.2m)
6.
7.

What is required for an electric charge to flow through a wire? zero resistance in the wire a balance of electric potential high resistance in the wire a difference in electric potential

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

How many meters will a car travel if its speed is 45 m/s in an interval of 11 seconds? question 2 options: a) 450 meters b) 495 meters c) 4.09 meters d) 498 meters