## Energy Resources

The heat capacity of aluminum is 0.900J/g C How much energy in joules is needed to raise the temperature of an 85 gram block of aluminum from 22.8 C to 96.4 C?

I have a stupid doubt.Let's suppose that I am driving a car, and you are stationary on the ground.From my point of view,I see that the world around me that,i.e., earth moving with velocity 'v'.Then...

A certain horse can maintain 1.0 hp of output for 2.4 hours with an efficiency of 72%. The horse is pulling a 220 kg object along a horizontal ground. The coefficient of kinetic friction between the...

A 0.80 kg block starts from rest above a 6 m slide and slides down. The block strikes the ground at a horizontal distance "d" from the end of the slide 0.30s after leaving the slide.   What...

Finding the air resistance.

Starting from rest, a 7-kg bowling ball rolls down a hill that is 2.1 meters high and then collides with a stationary 1.5-kg cardboard box. If the bowling ball continues rolling forward at...