Answer to Question #39530 in Acoustics for Temmy1

Question

( 1.) A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is not true?<
(A) The passenger is in motion relative to the passer-by

(B) The passer-by is stationery relative to the passenger

(C) Both observers are in motion relative to each other

(D) The passer-by is in motion relative to the passenger

( 2.) Which of the following statements is not correct about reference frames?

(A) Laws of physics are invariant in inertial reference frames

(B) In non-inertial reference frames the motion of objects depend only on the interactions of constituent particles among themselves

(C) Any reference frame moving at constant velocity with respect to an inerial refernce frame is also inertial

(D) If the coordinate axes of a reference frame attached to an object remain fixed in space then the object is at rest

( 3.) What are the dimensions of power (time rate of change of expending energy)
ML/T^2
ML^2/T^3
ML^2/T^2
M^2L^2/T^3