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456. Newton’s first law gives the defenition for:
(a)Force
(b) Velocity
(c) Mass
(d) Inertia
(b) Velocity
(c) Mass
(d) Inertia
Answer:- Inertia
457. The type of glass which can cut off ultra violet rays:
(a)Flint glass
(b) Crookes glass
(c) Pyrex glass
(d) Safety glass
(b) Crookes glass
(c) Pyrex glass
(d) Safety glass
Answer:- Crookes glass
458. The energy absorbed during the change of a state of substance is called:
(a)Specific heat
(b) Latent heat
(c) Coefficient of expansion
(d) Refractive index
(b) Latent heat
(c) Coefficient of expansion
(d) Refractive index
Answer:- Latent heat
459. The mirror used in search light is:
(a)Convex
(b) Concave
(c) Spherical
(d) Parabolic
(b) Concave
(c) Spherical
(d) Parabolic
Answer:- Parabolic
460. What is measured by spring balance?
(a)Weight
(b) Density
(c) Mass
(d) Pressure
(b) Density
(c) Mass
(d) Pressure
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