Machines are never 100 percent efficient because some work is used to overcome friction and inertia. true false

Nuclear decay is the spontaneous decay of one element into a. an x-ray b. a ray of light c. another element

If 2 molecules of one reactant combine with 3 molecules of another to produce 5 molecules of a product, then what is the representation of the reaction?

What is the magnitude of the force of gravity between to 1000 kg cars which are separated by distance of 25. 0 km on an interstate highway? the force between the two cars will be what