A light bulb has a power output of 80 W and it has been left on for 90 seconds. How much work was done?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

The ability to make things happen is also called a. heat b. force c. matter d. energy