Suppose the electric company charges $0.50/kilo-watt-hour. calculate how much does it cost to operate the electric heater described above for 6 hours a day for 30 days.

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !