Two hockey pucks with mass 0.1 kg slide across the ice and collide. before the collision, puck 1 is going 8 m/s to the east and puck 2 is going 7 m/s to the west. after the collision, puck 1 is going 7 m/s to the west. what is the velocity of puck 2? a. 7 m/s east b. 8 m/s west c. 8 m/s east d. 7 m/s west

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward

=force × distance a. work b. velocity c. pressure d. momentum

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?