If you could figure this one out i would be much obliged : d

how does a steam engine do work?

a. steam expands and spins an axle
b. steam causes wheels to turn
c. steam turns a turbine
d. steam enters a cylinder and pushes a piston.

explain why.

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

Which of the following describes a situation where competition between producers exists

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?