Sound — Science STD 9 — Question

State the general name of the waves on which the particles of the medium vibrate:
In the same direction as wave.

All the gases form cathode rays and anode rays when electricity is passed through them:
What does the formation of cathode rays tell us about the atoms?

What is the total momentum of the bullet and the gun before firing?

What is the value of gravitational constant G (i) on the earth, and (ii) on the moon?

A satellite goes round the earth in a circular orbit with constant speed. Is the motion uniform or accelerated?

This photograph shows a man-made 'communication satellite' going round the earth in a circular orbit (or circular path). We can see the dish antennae and solar panels (made of solar cells) clearly in this photograph.

This photograph shows a watch. The tip of seconds 'hand of this watch moves rapidly on the dial of the watch. The tips of minutes' hand and hours' also move on the dial but they move slowly.

Name the device or machines which convert:
Chemical energy into electrical energy.

Name the property of any one of the components which can be used for separation the following mixture:
Salt and Camphor.

Is work a scalar or a vector quantity.

Name the type of motion in which a body has a constant speed but not constant velocity.

Which of the following are not compounds?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond.