(A) Difference in atmospheric pressure
(B) Difference in atmospheric temperature
(C) Rotation of the Earth
(D) Both (A) and (B)

(a) frequency

(b) temperature

(c) velocity

(d) wavelength

(a) linear momentum

(b) angular momentum

(c) energy mass

(d) mass velocity

(a) metric scale

(b) quack scale

(d) richter scale

(d) epicenter scale

(a) more or less than the true weight

(b) equally to the true weight

(c) less than the true weight

(d) more than the true weight

(a) electrical energy into mechanical energy

(b) mechanical energy into electrical energy

(c) electrical energy into light energy

(d) none of these

(a) kinetic energy

(b) potential energy

(c) both a & b

(d) none of these

(a) light year

(b) weber

(c) angstrom

(d) lux

(a) newton’s first law

(b) newton’s second law

(c) newtons’ third law

(d) all of these

(a) newton’s first law

(b) newton’s second law

(c) newton’s third law

(d) principle of conservation of linear momentum