Question

5. The _______of a substance is the ratio of its mass to volume.
6. The distance travelled by a body in unit time is known as its__________
7. The speed of fast moving objects are expressed in________​

Answer 1

Answer:

5. density

6. speed

7. joules

Answer 2

Answer:

5. The density of a substance is the ratio of its mass to volume.

6. The distance travelled by a body in unit time is known as it's speed.

7. The speed of fast moving objects are expressed in km/h .

Hope it helps you.