Gravitation — Science STD 9 — Question

......... is said to be done only when the force applied on a body makes the body to move:

If the temperature of an object is 268K, it will be equivalent to:

1. -5°C
2. +5°C
3. 368°C
4. -25°C

50. Which of the following can sometimes be 'zero' for a moving body?

1. Average velocity.
2. Distance travelled.
3. Average speed.
4. Displacement.

The time taken to complete one oscillation is called.

You are sitting in a stationary car. There is a helium balloon tied to its floor. You accelerate and obviously feel like you are being pushed backwards (against the direction of your accelerations). The balloon.

A disused railway line has a length of 300m. A man puts his ear against one end of the rail and another man hits the other end with a metal hammer. Sound travels at 5000m/ s in steel. The time it takes for the sound to travel along the rail is:

Which of the following path is assumed for the electron in the theory of Rutherford:

The cell organelle involved in forming complex sugars from simple sugars are:

The growing of different crops on a piece of land in pre-planned succession is called: