Which of these is the best definition of a fuel cell?

A uniform disk with a mass of 10 kg and a diatmer 0.5 m

Identify the role of indicators

A motorcyclist changes the velocity of his bike from 20.0 meters/second to 35.0 meters/second under a constant acceleration of 4.00 meters/second2. How long does it take the bike to reach the final velocity?

Assuming motion is on a straight path, what would result in two positive components of a vector? A) a train moving north of east at an angle of 25° B) a bus moving north of east at an angle of 95° C) a boat moving south of west at an angle of 40° D)

An object accelerates at 3 meters per second squared when a 10-newton (N) force is applied to it. Which force would cause this object to accelerate at 6 meters per second squared?

Why do two hydrogen atoms bond to form a hydrogen molecule

Suppose the gravitational force between two spheres is 100 N. If the distance between the spheres is halved, what is the new gravitational force between them?

Ilya and Anya each can run at a speed of 8.00 mph and walk at a speed of 3.20 mph. They set off together on a route of length 5.00 miles.

Jill is getting ready to push little Frank in his swing. She pulls Frank back as high as she can and then releases the swing. What is the initial transfer of energy that accelerates the swing when she lets go?

Which phenomenon generates electric current? A black body radiation B ultraviolet catastrophe C emission spectra D photoelectric effect