Which are two pieces of evidence supporting the big bang theory? A. black holes and pulsars
B. dark matter and dark energy
C. eclipsing binaries and quasars
D. cosmic background radiation and Hubble's law
Group of answer choices

An observer that stands still as the electron moves by him, will observe

If steel is more dense that lake water, why can a boat float

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?