A coolie of 40kg weight carries 20kg salt and climbs up 20steps of 20 centimetre each in 2 minutes. calculate the work done by him and his power. where acceleration due to gravity is 10m/s square please help me with this
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Calculate the heat capacity per object when the total energy is 4 quanta. (think of this in terms of increasing from 3.5 quanta of energy in the system to 4.5 quanta of energy in the system, if that were possible.) c4 = __ j/k/object

What type of nuclear decay causes the atomic number of an element to increase by 1?

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?