Explain the meaning of the term speed.
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Speed of the body is distance travelled by the body in unit time. It tells us about the motion of the body i.e. how fast or slow it is moving.
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How does the density of water change when:
(a) it is heated from 0°C to 4°C,
(b) it is heated from 4°C to 10°C ?
Write the density of water at 4°C.
Write the S.I. unit of speed.
A car travels with a speed 12 m s-1, while a scooter travels with a speed 36 km h-1. Which of the two travels faster?