Describe two changes of state that releases energy

A red opaque object A. reflects all colors of the visible spectrum but red. B. absorbs red light only. C. reflects red light only. D. absorbs all colors of the visible spectrum equally.

You place a cup of 205oF coffee on a table in a room that is 72oF, and 10 minutes later, it is 195oF. Approximately how long will it be before the coffee is 180oF? Use Newton's law of cooling: / [T (t) = T _{A} + (T _{o}-T _{A}) e ^{-kt}/] A.

According to the Aufbau principle, a. electrons enter orbitals of lowest energy first. b. electrons enter orbitals of highest energy first. c. an orbital may be occupied by only two electrons. d.

Where are waves found in nature? Sound Water Light All of the above

You load an arrow into a bow and pull the bowstring back. 50m. The bow has a spring constant k=2000N/m. What is the potential energy of the bowstring?

How does gravity influence our annual calendar?

A 0.500 kg block is sitting on a horizontal, frictionless surface. The block is connected to a horizontal spring with a force constant of 124 N/m. The other end of the horizontal spring rests against a wall. When a 100.

The velocity of waves in a ripple tank of a particular depth of water is 20 centimeters per second, and standing waves are produced with nodes spaced 2.0 centimeters apart. what is the frequency of the wave generator?

If a wave is generated in a Slinky and the wave hits a wall, the reflected wave will be

While spinning in a centrifuge a 70.0 KG astronaut experiences an acceleration of 2.00g, or twice the acceleration due to gravity on the earth. What is the centripetal force acting on her? A.) 6.86*10^3N B.) 1.37*10^3N C.) 1.40*10^2N D.) 3.46*10^4N