Question

45. The correct relation is:
a) d = M × V b) M = d × V
c)V = d × M d) d = M +V
46.The density of alcohol is 0.8 g cm-3. In S.I. unit, it will be:
a) 0.8 kg m-3 b)0.0008 kg m-3
c)800 kg m-3 d)8 x 103kg m-3
47.The density of aluminium is 2.7 g cm-3 and of brass is 8.4 g cm-3. For the same mass, the volume of
a) both will be same
b) aluminium will be less than that of brass
c) aluminium will be more than that of brass
d) nothing can be said
48.A block of wood of density 0.8 g cm-3 has a volume of 60 cm3. The mass of block will be:
a)60.8 g b)75 g c) 48 g d) 0.013 g
49. The correct relation for speed is
a) Speed = distance x time
b) speed = distance / time
c) speed = time / distance
d) speed = 1 / distance x time
50.A boy travels a distance 150 m in 1 minute. His speed is
a) 150 m s-1 b) 2.5 m s-1 c) 25 m s-1 d) 9 m s-1
51.Substances which larger masses are usually measured in
a) kilograms b) grams c) tones d) metric tones
52. In SI system the unit of area is
a) meter b) square c) meter square d) meter cube
53. The standard unit of time according to SI system is
a) minute b) second c) hour d) day
54. A single system on which all scientists all over the world agree for units of measurement is called
a) SI units b) International System of Units
c) both a and b d) universal system
55. An average speed of an aero plane is equal to
a) 300m/s b)100m/s c)500m/s d) 50m/s​

Answer 1

Answer:

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