If a substance can be separated by physical means and it is not the same throughout, what is it.
a. compound
b. a heterogeneous mixture
c. an element
d. a homogeneous solution

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

Select all the correct answers.which two statements are true? a moving magnetic field creates an electric field.a constant magnetic field creates an electric field.a constant electric field creates a magnetic field.a moving electric field creates a magnetic field.resetnext

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.