Two people who weigh the same amount climb a flight of stairs. the first person climbs the stairs in 30 s, while the second person climbs them in 40 s. which person does more work? which uses more power?

Why is no work done when you hold a book in place over your head?

If you want to know how energy will move between two objects, what do you need to know about the objects?

Which of the following occurs when the strength of the current flowing through a wire is increased? A. the direction of the field changesB. the magnetic force is createdC. the magnetic field is increasedD. the magnetic field is decreased

How can you tell that a measurement is a vector?

If the atomic number of an element is 6 and its mass number is 14, how many neutrons are contained in the nucleus?

Which statement about magnetic poles is accurate? A) Same magnetic poles attract, while different magnetic poles repel. B) Same magnetic poles attract, while different magnetic poles attract.

Power is measured in: A) J/s B) J2/s C) s/J D) s2/J

The amount or the strength of force is called its

An airplane in flight has a pressure difference between the lower and upper wing surface; this provides an upward force that balances the weight of the plane.

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