A pulley is used to lift a heavy mass from the floor to a platform. The IMA of the system is 5 and the AMA is 2.5. What is the efficiency of the system?

An electric heater is constructed by applying a potential difference of 120 v to a nichrome wire that has a total resistance of 6.00. find the current carried by the wire and the power rating of the heater.

What are the scientific tools used to measure mass, volume, temperature, and length?

What happens as water cools

How some bodies emit light

A bookcase has a mass of 37 kg. What is the weight of the bookcase?

Sonja is riding her bike. She takes her feet off the pedals to freewheel down a hill. Describe the energy transfers that take place as the bike travels down the hill. Ignore friction and air resistance.

Three forces that act on a roller coaster: Gravity Air Resistance Inertia Am I right?

Electrical energy is the most useful form of energy. Is this statement a fact or an opinion? Explain.

Describe how private citizens have a voice in which projects the federal government will fund

What two factors cause change in seasons