Afixed amount of ideal gas is held in a rigid container that expands negligibly when heated. at 20°c the gas pressure is p. if we add enough heat to increase the temperature from 20°c to 40°c, the pressure will be:
a. equal to 2p
b. less than 2p
c. impossible to determine since we do not know the number of moles of gas in the container
d. greater than 2p
or
e. impossible to determine since we do not know the volume of gas in the container.

If it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star

More solar radiation is absorbed by earth’s surface than by

Researchers conducted an experiment to identify the effects of three different hand sanitizers on the growth of bacteria. the researchers grew one type of bacteria in twenty-four identical covered petri dishes. then, they opened eighteen petri dishes and applied the three hand sanitizers to six petri dishes each. they left the remaining six petri dishes closed as a control group. when the researchers measured the growth of bacteria two days later, the six dishes that had no hand sanitizer showed the least amount of bacterial growth. the researchers concluded that not using any hand sanitizer would lead to the least bacterial growth. which statement best explains why the researchers’ conclusion was not justified? the experiment tested too many variables. the control group was not treated the same as the experimental group. the sample size of twenty-four petri dishes is not large enough. the single type of bacteria is not adequate to make any conclusions.