You have 5 grams of radioactive substance A and 5 grams of radioactive substance B. Both decay by
emitting alpha-radiation, and you know that the higher
the number of alpha-particles emitted in a given amount
of time, the more dangerous the sample is. Substance A
has a short half-life (around 4 days or so) and substance
B has a longer half-life (around 10 months or so). Which
substance is more dangerous right now? Explain.

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc

How is acceleration calculated? a. initial velocity - final velocity / timeb. initial velocity + final velocity / timec. final velocity - initial velocity / timed. final velocity / timele select the best answer from the choices provided0oood00save and exitnextmark this and return