Which of the following processes is NOT a chemical change?

A

burning candles

B

cooking an egg

C

grilling a steak

D

mowing grass

A solid motor has an average thrust of 67,000 N, a specific impulse of 285 sec, and a propellant mass fraction of 0.92. Calculate the total mass of the vehicle for a 42 sec burn time.

An AC generator has a maximum output emf of 4.20 x 102 V. What is the rms emf? (Remember ΔVrms = 0.707Vmax)

Identify which phase of matter would transmit light waves the fastest, and why? A) The gas would transmit the fastest because the particles move the fastest. B) The solid would transmit the fastest because the particles are closest together.

If you lift a five pound object 18 inches how many joules of energy did yo use?

3. Which of the following is an ionic compound? a. Zinc Oxide c. Nitrogen dioxide b. Sulfur dioxide d. Carbon tetrafluoride

Four fundemental forces from weakest to strongest

Which of the following is a correct principle of relative-age dating? A. In undisturbed rock layers, the youngest rocks are on the bottom. B. Rock-forming materials are deposited in horizontal layers, though they may be tilted later. C.

The Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided? A) Element B) Atom C) Electron D) Molecule

A researcher rolls some clay into a ball and shows it to Zian, then squishes the clay into a pancake. Zian understands that the amount of clay is the same in both.

How are the magnets able to have zero resistance