Q. 1 The density of a substance is 10000 kg m-3
and that of water is 1000 kg m-3
. The relative density of
the substance is
(a) 100 (b) 1000 (c) 10 (d) 10000
Q. 2 A force of 50N is applied on a surface of area 5 m2
. The pressure on the surface will be
(a) 10 Pa (b) 20 Pa (c) 250 Pa (d) 55 Pa
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Answer:
2. preassure =force÷area there fore 50N×5m² =250 pa
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