Why do rivers usually have water in them, even during a drought?

What is hard water and what is soft water

What does it mean to say the mass is conserved during a physical change?

If 0.20 kg of iron at 100 C is added to 1.00 kg of water at 20.0 C what is the final temperature of the system

What is defined as a material resistance to the transmission of light waves flashcards?

Which are properties of a liquid? Check all that apply. . can change shape to conform to a container . has a rigid shape that does not change easily . contains free-moving ions and electrons . is compressed more easily than other states .

Consider the flow of an incompressible Newtonian fluid between two parallel plates that are 4 mm apart. If the upper plate moves to the right with u1 = 5 m/s, while the bottom one moves to the left with u2 = 1.

Calculate the force of earth's gravity on a 1kg mass at earth's surface. the mass of the earth is 6.0

A train started from rest and moved with constant acceleration. At one time it was traveling 27 m/s, and 150 m farther on it was traveling 54 m/s.

What best describes the motion of the medium particles in a longitudinal wave?

How many electrons are in the third energy level of a calcium atom