Travel 4.
Waves are energy in motion in some medium. Which is the best
explanation of how waves get their energy?
A. Waves get their energy from the wind.
B. Waves get their energy from random motions of the molecules of
their medium.
C. Waves get their energy from an original or continuing
disturbance of the medium.
D. Waves get their energy from seismic events such as offshore
earthquakes.

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

From the choices provided below, list the reagent(s) in order that will react with cyclopentanone to form the compound shown below.