What would the RPM be if we were turning a 1.00" diameter work piece made out of mild steel, using HSS cutting tool?

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?

Contains chemical energy. a. heat b. light c. natural gas