Consider a wire that has resistance r, length l and the cross-sectional area

a. the correct expression for the resistivity of that wire is:

Energy degradation takes place in the energy transformations which occur in the generation of electrical power. Explain what is meant in this context by energy degradation.

Two books are located 1 m above the surface of the Earth. The first has a mass of 2 kg; the second has a mass of 1 kg. Which statement about the pull of Earth's gravity is true? A.

Ocean waves are examples of: A) transverse waves B) longitudinal waves C) circular waves

What happens to a gas when its temperature decreases? A) gas becomes a plasma B) molecules move more slowly C) energy of the particles increases D) atoms in the gas are destroyed

A beaker is filled to the brim with water. A solid object of mass 3.00 kg is lowered into the beaker so the object is fully submerged in the water (see the drawing). During this process, 2.00 kg of water flows over the rim and out of the beaker.

When a 3.50-g sample of liquid octane (c8h18) is burned in a bomb calorimeter, the temperature of the calorimeter rises by 27.3 ∘c. the heat capacity of the calorimeter, measured in a separate experiment, is 6.22 kj/∘c?

Air has pressure because a. the stratosphere is thick b. air has mass c. wind moves the air d. temperature warms the air

What types of exercises for stomach

Which states the law of conservation of energy? A. Energy cannot be created or destroyed, but it can be converted or changed into different forms. B. Energy can be created or destroyed, and it can be converted or changed into different forms. C.

What is density? How can you find density?