Five thousand joules of heat is put into a Carnot engine whose hot and cold reservoirs have temperatures of 640 and 190 K, respectively. How much heat is converted into work

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

Which governments provide garbage collection services to homes and businesses

What is a subatomic particle with a negative charge and very little mass?