Physics Questions and Answers March 23, 2020

To meet their design criterion, small ball bearings must bounce through a small opening at the top of their trajectory when rebounding from a heavy steel plate. You do not know the incoming velocity relative to the plate for the ball bearings or the coefficient of restitution. Using the apparatus geometry shown below for the ball bearings, and

A perfect heat pump supplies heat to a building so that the temperature is 27 C. The cold reservoir is river water at 7 C. What is the power delivered heat to the building if the electric power of the compressor is 1 kW? Select the correct answer from the following list: a) 2.86 kW b) 3.85 kW c) 1.35 kW d) 14 kW e) 15 kW

Suppose 12 charged particles of identical charge q are placed around the circumference of a clock of radius r, one at each number positions uniformly separated. (a) Derive the equation for net electric force on a test charge Q placed at the center of this clock? (b) Suppose you remove the charge from 6 o\\\'clock position, what will be the new net

Calculate I1, I2, and I3.

Calculate (a) V1, (b) V2, (c) R, (d) current in the 3 resistor, (e) current through V1, and (f) current through V2.

2.00 A R V, 4.00 N 23.00 N 6.00 N 3.00 A 15.00 A