Q1. Calcuate the speed of the following waves: (a) A water wave of wavelength 6.Om and frequency 4, OHz travels over the
surface of a pond. What is its speed?

When an object is heated it contracts. a. true b. false

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero