The speed of an electron having a wavelength of 10-10 m (the order of magnitude of atomic spacing in crystals) is 7.27 x 106 m/s. Through what potential difference must an electron be accelerated to acquire this speed?

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.