Based on the information in the passage, what is true of gases?
a. some, but not all, gases are harmful to humans.
b. any gas with carbon in it is not harmful to humans.
c. all gases are harmful to humans.
d. no gases are harmful to humans.

In which of these cases are the two wave points considered to be in phase with each other?

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.