Which statement describes why geothermal heat pumps work?

Given an incompressible 2D flow with x and z velocity given by u = alpha*x and w = beta * z A) how are alpha and beta related? B) if the initial positions (t=0) are given by X and Z what are the fluid positions x, z in terms of X, Z, t?

Why do water and table salt have very different properties?

How can a machine make work easier for you? a. by decreasing the amount of work you do on an object b. by changing the direction of your applied force c. by increasing the the work done by the machine d. none of the above I think maybe a.

The height, s, of a ball thrown straight down with initial speed 64 ft/sec from a cliff 80 feet high is s (t) = â16t2 â 64t + 80, where t is the time elapsed that the ball is in the air.

Which of the following lists arranges the colors of light from highest energy to lowest energy? a. red, green, blue b. blue, green, red c. green, red, blue d. red, blue, green

8. A gas is contained in a horizontal piston-cylinder apparatus at a pressure of 350 kPa and a volume of 0.02 m3. Determine the work done by the piston on the gas if the cylinder volume is increased to 0.15 m3 through heating.

A 75.0 kg person stands on a scale in an elevator. (a) What does the scale read (in N and in kg) when the elevator is at rest?

The hinge at A and cable BDC support beam ABC. Cable BDC passes over the pulley D that is pinned to the ceiling. (Assume that the + x-axis is to the right and the + y-axis is up along the page.

The "zone of avoidance" a) Accounts for the absence of any planet between the orbits of Mars and Jupiter Prevents collisions between planets in the Solar System.

Electric current is ...