Reference no: EM132610696
A rotating flywheel can be used as a method to store energy. If it has 2.0 × 106 J of kinetic energy when rotating at 350 rad/s, and if a frictional torque of 4.0 Nm acts on the system, in what interval of time would the flywheel come to rest?
How deep under the surface of a lake would the pressure be double that at the surface? (1 atm = 1.01 × 105 Pa)
A bat, flying at 6 m/s toward a wall, emits a chirp at 51 kHz. If the wall reflects this sound pulse, what is the frequency of the echo received by the bat? (vsound = 340 m/s)
The Greenland ice sheet can be one km thick. Estimate the pressure underneath the ice. (The density of ice is 918 kg/m3.)
In which of the following situations, momentum is conserved, in the absence of external forces acting in a system?
Select one:
a. Explosion
b. Inelastic collision
c. All of the choices
d. Elastic collision
A crate with a mass of 4 kg is lifted to a height of 10 m. How much work is done?