A 120VAC electric heater has two resistive heating elements that can be switched separately in and out, in series or parallel. Find the values of the two resistors if the minimum power drawn by the heater is 300 watts and the maximum is 1200 watts.

What is the relationship between the wavelength of a wave and it's energy?

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

Properties seen when one one substance changes to another are known as properties