PLEASE HELP 15 points An arrangement of helium balloons in the back of a delivery truck travels from a town at
the base of a mountain up the mountain where the air pressure is half the amount. What
do you expect to happen to the balloons?
a. The balloons will increase to twice their original volume.
b. The balloons will decrease to half their original size.
C. The balloons will increase to four times their original size.
d. The balloons will decease to one fourth their original size.

Aphysical change is a change in the size, shape,, or stafe of matter true or false

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

Determine the force the sun exerts on an object with a mass of 80.0 kg if that object is on the earth. what is the force exerted by the moon on the same object? what is the force the earth exerts on it?