How can friction be reduced when it is a problem

Sound transfers energy through solid liquid and gas what does ocean waves transfer energy through is it water or water and air as evaporation

1) The amount of charge and the distance from the magnetic field determine the A) strength of the negative charge. B) strength of the positive charge. C) strength of the electric field. D) static electricity.

While on a moving elevator during a certain perfod or time, Frank's apparent weight is 620 N. If Frank's mass is 70 kg, what is the magnitude and direction of Frank's acceleration?

Consider two pipes of the same length. One pipe is open at both ends and the other pipe is closed on one end but open at the other end.

Planetary nebulae are characterized by an emission spectrum consisting of Balmer (hydrogen) emission lines and a pair of strong emission lines at 4959˚A and 5007˚A that were quite mysterious when first seen.

Muscle control is the ability to quickly change directions and make complex movements

According to the first law of thermodynamics, what could happen when heat is added to a system? The internal energy of the system decreases. The heat is turned into work done by the system. New energy is created within the system.

How does a parallel circuit differ from a series circuit? A. A parallel circuit has one path for electrons, but a series circuit has more than one path. B. A series circuit has one path for electrons, but a parallel circuit has more than one path. C.

When a potassium ion (k+) enters a gaurd cell it creates a solution of what?

If two plates diverge at a rate of 1.3 cm/year, how much farther apart will the plates be after 200 million years?