A geologist needs to measure the density

of an irregularly shaped pebble.

a Describe how she can find its volume by the method of displacement.

b What other measurement must she make if she is to find its density?

A negatively charged particle is moving to the right, directly above a wire having a current flowing to the right, as shown below. In which direction is the magnetic force exerted on the particle? Answera. out of the pageb. into the pagec. upwardd.

Stephan is standing on the ground by a mesa in the painted desert. stephan is 1.8 meters tall and sights the top of the mesa at 29 degrees. stephan steps back 100 meters and sights the top at 25 degrees. how tall is the mesa

What is a circuit where there are two or more pathways

15. One purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction C. allow water to flow away from the tire. d. look impressive.

Calculate the longest wavelength visible to the human eye. express the wavelength in nanometers to three significant figures.

Is it possible to have a weak acid or base?

Why does an object accelerate when falling to earth's surface?

2.5 g of helium at an initial temperature of 300 K interacts thermally with 9.0 g of oxygen at an initial temperature of 620 K.

34. A steam engine operates between 300K and 600K, the maximum possible efficiency of this engine is a. 100% b. 75% c. 50% d. 25%

How many moles of phosphorus trichloride are in 200 grams of the molecule? 62.67 mol 27,466.6 mol 1.46 mol 0.69 mol