Form a hypothesis: A hypothesis is a proposed explanation for an observation. Hypotheses must be testable. Write a hypothesis about what causes the aliens to change their shape. Hint: hold 2 variables constant, and change only 1.

volume: 22

density: 7.04

i think its c if i'm wrong

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me