How to calculate force of neodymium magnets?

How much energy is needed to heat 3 kg of water through the following changes? 1. Heat 3 kg ice from - 10 C to 0 C 2. Melt 3 kg ice at 0 C 3. Heat 3 kg water from 0 C to 100 C 4. Vaporize 3 kg water at 100 C 5. Heat 3 kg steam from 100 C to 110

A subatomic particle X spontaneously decays into two particles, A and B, each of rest energy 1.40 * 10^2 MeV. The particles fly off in opposite directions, each with speed 0.827c relative to an inertial reference frame S.

If a balloon is left in a closed car on a hot day, what will happen to it?

Psychology only focus on how people think and feel. True or false?

If a toaster produces 12 ohms of resistance in a 120-volt circuit, what is the amount of current in the circuit?

During a demonstration of the gravitational force on falling objects to her class, Sarah drops an 11 lb. bowling ball from the top of the science building. Determine distance the ball has traveled after falling for 1.

A teacher wants to demonstrate that unheated water can boil at room temperature in a beaker within a bell jar connected to a vac-uum pump. However, the vacuum pump is faulty and can reduce pressures only to 15 kPa.

How many btus of heat energy are needed to raise the temperature of 99.6 lbs of water from 50 °f to 130 °f?

What is a different form of a characteristic, such as brown hair, is called

A book falls of the table and hits the floor. Is work done? Why?