Two marbles (m = 0.050 kg each) moving on a table towards each other with the speed of 0.3 m/s collide, and start moving away from each other.
a) what is the total momentum of this system before the collision?
v1 = m/s, v2 = m/s,

p1 = kg m/s, p2 = kg m/s,

ptotal = kg m/s

A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.