Which of the following types of waves needs a medium for ...
Which of the following types of waves needs a medium for propagation?
sound waves
light waves
radio waves
x - rays
Correct answer is A
Sound is the only mechanical wave among the rest which are electromagnetic waves.
The force of repulsion between two point positive charges 5μC and 8μC separated at a dis...
One thousand microns is equal to ...
According to kinetic molecular model, in gases ...
Which of the following statements about a progressive mechanical wave is correct? ...
When some ice cubes are added to a glass of warm water, the glass is cooled by a process of ...
Light travels in straight lines. In which of the following is this principle manifested? I. Pinho...
In the fig above W1 = 200g, and W2 =450g . Calculate the extension of the spring per unit load? [...