is the thermal energy transferred in a refrigerator primarily by conduction, convection or radiation? explain your answer

Your backpack has a mass of 8 kg. You lift it from the ground to a height of 0.7 m. How much work is done by gravity as you lift the backpack?

Ronnie kicks a playground ball with an initial velocity of 16 m/s at an angle of 40° relative to the ground. What is the approximate horizontal component of the initial velocity?

What causes a objects to move or stay still? claim and evidence

To warm 2.0 l of tea (d = 1.01 g/ml; sp. heat = a cook places a 500 g block of stone at a temperature of 200f into the teapot. assuming that the tea was initially at 72f, what is the final temperature of the tea in f? a. 33 b. 91 c. 110 d. 140 e.

Which structures are in the cytoplasm?

The malfunction indicator light in an OBD II system is flashing. Technician A says that this simply indicates a soft failure. Technician B says this means the problem could be damaging the catalytic converter. Who is right? A. Technician A only B.

What are some methods humans have used to control flooding and what has been done to worsen the effects of flooding?

Suppose an electron is moving with a constant velocity until it encounters a positively charged sphere on its right. How does the sphere alter the trajectory of the electron? a. It has no effect on the trajectory of the electron b.

Most of the mass of the Milky Way exists in the form of: a.) starsb.) gasc.) dustd.) dark matter

A 55kg cart is pushed by a force of 225 n. what is the carts acceleration?