You are pushing horizontally with 132 N, on a 76.0 kg couch, which is at rest. The couchstarts to accelerate at 0.18 m/s?. What is the force of friction between the couch and carpet?

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

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?