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__________?
43. Which one of the following is mass less?
44. Name the branch of science which deals with the study of sound and sound waves?
45. The formula of inter-conversion of centigrade and Fahrenheit scale is___________?
B. f -32/9 =c/5
46. The co efficient of linear expansion is equal to__________?
A. ΔL = αLΔT
47. The unit of coefficient of linear expansion or volume expansion is__________?
C. K -2
48. linear expansion occurs in_________?
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 ____________________?