Shock Wave MCQs with Answers PDF Download – Test 142

MCQ 706: Conical pressure wave front produced by a body moving at a speed greater than that of sound is called:

1. Elliptical cone
2. Mach cone
3. Noch cone
4. Unit cone

MCQ 707: If a wave traveling along a string is y(x,t)=0.0032sin(72.1x-2.72t), in which numerical constants are in SI units i.e. 0.0032m, 72.1rad/m and 2.72rad/s, then velocity of wave is:

1. 2 m/s
2. 0.32 m/s
3. 0.037 m/s
4. 0.023 m/s

MCQ 708: Conservation law holds in rotational motion if:

1. torque is constant
2. displacement is constant
3. angular momentum is constant
4. transnational power is constant

MCQ 709: Average speed of an object is equals to:

1. total distance covered by object/2
2. total distance covered by object/60m
3. total distance covered by object/rate of change of time
4. 2 x total distance covered by object/rate of change of time

MCQ 710: Terminal speed of a typical parachutist is almost:

1. 1 m/s
2. 2 m/s
3. 60 m/s
4. 5 m/s