Which statement is true about gravitational forces?
a.
only masses of equal size exert a gravitational force on each other.
b.
every mass exerts a gravitational force on every other mass.
c.
only large masses exert a gravitational force on small masses.
d.
only moving masses exert a gravitational force on stationary masses.

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.

Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?