Echo is heard due to
A). Refraction
B). Scattering
C). Reflection
D). Interference
Reflection
An echo is a sound that is repeated because the sound waves are reflected back.
1. If a body slides over a surface, the force resisting the motion between them is called ______.
2. In a photocell light energy is converted into
4. Kilowatt hour is the unit of
5. Clouds float in the atmosphere because of their
8. Indicate the false statement about the resistance of a wire
10. It is easier to roll a stone up a sloping road than to lift it vertical upwards because