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at the earth's surface, warm air expands and rises, leaving behind what is known as an area of
cold air is dense and sinks to the surface to create what is known as an area of

answer choices:
low pressure
high pressure
condution
convection
if u answer i will put u as brainiest answer and give u a u

Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. these cyclotrons typically accelerate h- (the hydride ion, which has one proton and two electrons) to an energy of 5 mev to 20 mev. this ion has a mass very close to that of a proton because the electron mass is negligible—about 1 2000 of the proton’s mass. a typical magnetic field in such cyclotrons is 1.9 t. (a) what is the speed of a 5.0-mev h-? (b) if the h- has energy 5.0 mev and b = 1.9 t, what is the radius of this ion’s circular orbit?

What is the speed vfinal of the electron when it is 10.0 cm from charge 1?

Asemipermeable membrane is placed between the following solutions. which solution will decrease in volume? solution a: 1.4% (m/v) starch solution b: 7.62% (m/v) starch