A. how many boxes of screws are needed to install 66 sheets of 4-ft by 14-ft by 5/8-in gypsum board if it requires 1.2 screws nails per square foot and there are 500 screws per box? (5 pts) b. how many lug nuts are in the truck junkyard if there are 582 half-ton trucks and 1475 three- quarter-ton trucks? half-ton trucks have five lugs per wheel and three-quarter-ton trucks have six lugs per wheel. do not round number. (5 pts) c. convert 1 light-minute (the distance light travels in 1 minute) to chains (a surveying measurement). (6 pts) d. how many troy ounces are in a cube of steel whose sides are 1.5 meters long if steel has a density of 490 pounds per cubic foot? (7 pts) e. how many board feet (bdf) of lumber are in one hundred fir trees if each tree is 60-feet tall and 30 inches in diameter? assume a 30% waste factor for converting "trees" to slumber. the formula for board feet is (nominal width in inches x nominal thickness in inches x length in feet)/12.

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

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. when you increase the plate separation, what happens to the following quantities?