Question

2. What is meant by substance?
3. What are canal rays?
4. An object travels 16m in 4s and then another 16m in 2s. What is the average speed of the object?
5. Define sublimation.
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Answer 1

Answer:

2. What is meant by substance?

A substance is a pure single form of matter. It cannot be separated into other kinds of matter by any physical process. The substance must be composed of atoms and molecules. The substance must have a particular amount of weight, mass and volume.

3. What are canal rays?

Canal rays are the rays of radiation which emerges in a tube which has been discharged and has the property of low pressure with voltage of high value conditions.

Explanation:

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Answer 2

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2.A substance is a pure single form of matter. It cannot be separated into other kinds of matter by any physical process. The substance must be composed of atoms and molecules. The substance must have a particular amount of weight, mass and volume.

hey sorry i dont know the answer of 3rd.. 4th question answer is in image form..

5..Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. ... The reverse process of sublimation is deposition or desublimation, in which a substance passes directly from a gas to a solid phase.