What is Mach number?
A) speed of object * speed of sound
B) speed of object /speed of sound
C) speed of object + speed of sound
D) speed of object- speed of sound
Correct Answer:
Verified
Q2: Which of the following kinetic friction is
Q3: A mass of 4kg rests on a
Q4: A scooter weighs 120kg f. Brakes are
Q5: How is friction due to air reduced?
A)streamlining
B)lubrication
C)by
Q6: Friction can be increased by_
A)using air cushion
B)lubricants
C)using
Q7: When moving along a curved path, he
A)leans
Q8: A train has to negotiate a curve
Q9: When a gas is pushed through a
Q10: In fluid dynamics, the velocity of the
Q11: If the speed of sound is much_than
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