Why doesn't anyone answer my questions? I just need some extra help. Can you please take the time to click on my profile and answer the space shuttle question?

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

Heterogeneous mixture with larger particles that never settle is

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.