What is the significance of the cmb?
oa. it provided direct proof of the big bang theory.
b. it shed light on the formation of the milky way.
c. it was the first direct observation of a supermassive black hole.
od. it provides proof of the existence of supermassive black holes.

The four giant gas points that are made primarily of lightweight elements are

Calculate the kinetic energy of earth due to its spinning about its axis. krot = j compare your answer with the kinetic energy of the orbital motion of earth's center of mass about the sun. assume earth to be a homogeneous sphere of mass 6.00 1024 kg and radius 6.40 106 m. the radius of earth's orbit is 1.50 1011 m.

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?