How is the expansion of the universe measured?

The equilibrium constant for the reaction of hydrogen gas and oxygen gas to produce water at 500 k is 2.4 * 1047. what does the magnitude of the equilibrium constant tell us about the reaction? 2 h2 (g) + o2 (g) ⇄ 2 h2o (g) k = 2.4 * 1047

Some earthquake waves, a cat's purr, and elephant communications consist of ultrasonic waves. True False

An iron nail is made up of particles. What is true about the particles? They move all over the place. The force of attraction between them is small. The spacing between them is large. They stay in place and vibrate.

An electronic package with a surface area of 1 m2 placed in an orbiting space station is exposed to space. The electronics in this package dissipate all 1850 W of its power to space through its exposed surface.

The refractive index of water is greater than that of air but is less than that of glass or a diamond. Under which condition can there be total internal reflection in water?

A group of two or more stars is called a A. solar system B. neutron star C. protostar D. star system

Which of the following is an example of potential energy? View Available Hint (s) Which of the following is an example of potential energy?

What type of material is wrapped around an object could cause the object to lose the most heat

What is the importance of the ozone layer?

Which of the following is an example of plasma?