7.
in a series sinusoidally driven lcr ac circuit, the
current lags the applied emf. the rate at which
energy is dissipated in the resistor, can be
increased by
(1) decreasing the capacitance and making no
other change
(2) increasing the capacitance and making no
other change
(3) increasing the inductance and making no other
change
(4) increasing the driving frequency and making no
other change
..
mwan: 440oor nie

Why is there friction between objects

Abatter hits the baseball a with an initial velocity of v0 = 110 ft/sec directly toward fielder b at an angle of 23° to the horizontal; the initial position of the ball is 2.2 ft above ground level. fielder b requires 0.44 sec to judge where the ball should be caught and begins moving to that position with constant speed. because of great experience, fielder b chooses his running speed so that he arrives at the “catch position” simultaneously with the baseball. the catch position is the field location at which the ball altitude is 8.4 ft. determine the velocity of the ball relative to the fielder at the instant the catch is made.

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?