a fan a car is moving forward on a frictionless surface. if you change the fan speed from high to low what will occur?

An automobile use a 75,000 J of chemical energy from Gosselin produce 10,000 J of useful output energy A. calculator it's efficiency B. where does the lost energy go, that part of the input work that doesn't become useful work?

What is the name of the North Star?

Select the correct answer. Julie is cycling at a speed of 3.4 meters/second. If the combined mass of the bicycle and Julie is 30 kilograms, what is the kinetic energy? 1.7 * 102 joules 1.5 * 102 joules 2.0 * 102 joules 2.2 * 102 joules

Bobby is riding his bike down the road at a speed of 10 miles per hour. Ahead of him, he sees another rider, moving in the same direction. Bobby is catching up with the rider ahead of him.

Who first calculated the orbits of comets based on historical records dating back to antiquity?

In an experiment, 108 J of work was done on a closed system. During this phase of the experiment, 79 J of heat energy was added to the system. What was the total change in the internal energy of the system?

J. J. Thomsons experiments provided evidence that an atom

How does our sun differ from most other main sequence stars?

A large body of air hats has similar properties of a temperature and moisture is a

An ice rink is 200 feet long and 85 feet wide. The four corners of the rink are rounded to a radius of 24 feet. What is the surface area of the rink? Round the answer to the nearest square foot.