Two point objects 80 cm apart are placed in front of a vertical plane mirror. The
Perpendicular distance from each object to the mirror is 1m. By construction show the minimum length of the mirror that a girl standing equidistant from each object and 50 cm in front of the mirror requires to see the images of the two objects.

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

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.