A hand holding a rope moves up and down to create a transverse wave on the rope. The hand completes an oscillation in 1.2 s, and the wave travels along the string at 0.8 m/s. The amplitude of the wave is 0.1 m. a.) Find the frequency at which the crests pass a given point in space.

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?