A certain motor uses 1300J of energy to raise a 30kg mass to a height 2.4 meters above where it started.
a) How much potential energy does the mass gain during the lift b) calculate the efficiency of this motor

Solar cell a produces 100 joules of energy, when a light source is shown on it for 3 minutes. solar cell b produces 200 joules of energy when the same light source is shown on it for 5 minutes. which solar cell works better? a) solar cell b, because it produces more energy. b) solar cell b, because it generates more power. c) solar cell a, because it produces energy quicker. d) solar cell a, because it generates a greater wattage. eliminate

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference