If 1.00 km^3 of air has a mass of 1.2x10^9 kg what is the density of air in g/cm^3

The Milky Way galaxy contains interstellar matter that may a. Form new galaxies b. Form new stars c. Form new universes D. Form new constellations

If two large ocean waves meet and they are in phase, an even bigger ocean wave will be created. a. True b. False

What happens when a gas is exposed to a small flame. list as many results.

Two rocks are moving through empty space in a straight line at the same speed. One has a mass of 10 kg, the other has a mass of 50 kg. Which statement about the rocks is true? A. Both will be stopped by the same amount of force acting against them.

What do scientists use to determine the temperature of a star? thermometer distance from Earth composition color NextReset

Which hormones are released in girls during puberty? A. testosterone and estrogen B. testosterone and progesterone C. ingesterone and estrogen D. estrogen and progesterone

Which property makes radio waves most useful for communication? They have low frequencies. They have long wavelengths. They transfer low amounts of energy.

Describe how water may be treated before it is used by people? P. S - This is a science question.

Using the formula for kinetic energy of a moving particle k=12mv2, find the kinetic energy ka of particle a and the kinetic energy kb of particle b. remember that both particles rotate about the y axis.

boris the bear is lumbering along at a constant rate of 4.0 m/s. if he walks for 600.0 seconds, how far will he travel?