Question

What are the magnitude and direction of electric field 25mm directly above an isolated 50μC

charge? [k=9×109 N.m2/C2 ]

:A cardiac defibrillator is used to shock a heart that is beating erratically. A capacitor in this device

is charged to 4.5KV and stores 1100J of energy. What is its capacitance?

How much work the mover do (horizontally) pushing a 100kg crate 10 m across a rough floor

Without acceleration, if the effective coefficient of friction was 0,5?

Answer 1