41. Study of living science relates with________?

A. Physical science
B. Biological science
C. Just living science
D. Organ science

42. The first book of Physics was written by__________?

A. Kelvin
B. Newton
C. Aristotle
D. Faraday

43. Which one of the following is mass less?

A. Proton
B. Electron
C. Neutron
D. Photon

44. Name the branch of science which deals with the study of sound and sound waves?

A. Aeronautics
B. Acoustics
C. Aerostatics
D. Aetiology

45. The formula of inter-conversion of centigrade and Fahrenheit scale is___________?

A. c-32/9
B. f -32/9 =c/5
C. f-32/9=c/9
D. none

46. The co efficient of linear expansion is equal to__________?

A. ΔL = αLΔT
B. ΔL/LΔT
C. LΔT/ΔL
D. αLΔT-ΔL

47. The unit of coefficient of linear expansion or volume expansion is__________?

A. K
B. K-1
C. K -2
D. none

48. linear expansion occurs in_________?

A. Solid
B. liquid
C. both
D. none

49. When body is in motion, ____________ always changes?

A. its velocity
B. its acceleration
C. its position vector
D. its momentum

50. A man is in a car is moving with velocity of 36km/hr. His speed with respect to the car is ____________________?

A. 10m/s
B. 36m/s
C. zero
D. infinite

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