How long does it take for a star the size of the sun to become a red giant?

explain why when someone uses his thumb to push a pin into a block of wood the pressure on the wood is greater than the pressure on this thumb

17.) A microwave is rated at 750 watts. How long will it take the microwave to do 5700 J of work on a cup of water? Assume 100% efficiency.

A man lifts a 25.9 kg bucket from a well and does 5.92 kJ of work. The acceleration of gravity is 9.8 m/s^2. How deep is the well? Assume that the speed of the bucket remains constant as it is lifted. Answer in units of m.

What is the value for gravitational acceleration to two decimal places in meters per second squared?

An electric current is produced using a bar magnet and a solenoid. Which changes will cause a decrease in the electric current produced? Check all that apply.

What is the kinetic energy of a 1,900 kg car moving at 89 km/h?

Why do we study black holes

Calculate the kinetic energy of a charging elephant if its mass is 5,000kg and it moves at 8m/s

Why is a decrease in Earth's ozone harmful to life?

What force does a window washer want acting on him when trying to keep the same position