The coefficient of friction is best described as a value for: A. the direction two surfaces are moving in with respect to each
other
B. the strength of the force of friction between two surfaces.
C. the speed of one surface as compared with a second surface.
D. the amount of friction that is pulling an object in one direction.

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?