The following statements about a loudspeaker are correct except?
An ice cube has mass of 20 g at 5°C. Calculate the energy required to raise its temperature to 0°C. [Specific heat capacity of ice = 2.1 J/g°c]
A stone is thrown horizontally with initial velocity 15m/s from a tower 20 m high. How long does it take to reach the ground? [g= 10m/s\(^2\)
Which of the following statements is not a characteristic of a plane progressive wave?
The electrons in a cathode-ray tube are produced by?
