What holds the stars together in their galaxies? A. light B. orbits of the planets C. weight D. gravity

For the equilibrium reaction N2O4 (g) ⇀↽ 2 NO2 (g) taking place inside a sealed container fitted with a piston, predict the effect of raising the piston (to increase the volume of the container) on the composition of the mixture. 1.

A particle moves on the x axis. When its acceleration is positive and increasing what can be said about its speed and velocity?

Color is unreliable for identifying minerals because

What is the magnitude of the force a 25 mC charge exerts on a + 2.5 mC charge 16 cm away?

The two main parts of a wave are the

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.

A car accelerates uniformly from 0 to 15m/s in 5 s. Calculate acceleration.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is:

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.