Question

Give reason for the following statements:

1. The lunar eclipse is fairly a common phenomenon.

2. We say that light is invisible.

3. The physical quantity such as mechanical advantage and efficiency of machine has no units.

4. The output energy of a real machine is always less than the input energy.

5. Aero-plane shadows do not cast on the ground.

don't write faltu answer​

Answer 1

Answer:

The lunar eclipse is fairly a common phenomenon.

2. We say that light is invisible.

3. The physical quantity such as mechanical advantage and efficiency of machine has no units.

4. The output energy of a real machine is always less than the input energy.

5. Aero-plane shadows do not cast on