A spring is stretched from x=0x=0 to x=dx=d, where x=0x=0 is the equilibrium position of the spring. It is then compressed from x=0x=0 to x=−dx=−d. What can be said about the energy required to stretch or compress the spring?

Why do astronauts in the space shuttle weigh less?

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.

Five structural isomers have the formula c6h14. where needed, draw the structure and give the iupac name of all five isomers.