Author Question: X-rays travel at a greater speed than radio waves. Indicate whether the statement is true or ... (Read 95 times)

pane00 · **on:** Jul 27, 2018

X-rays travel at a greater speed than radio waves.

Indicate whether the statement is true or false

Question 2

Approximately, what basic composition are all stars born with?

A) half hydrogen, half helium, no more than 2 percent heavier elements
B) three-quarters hydrogen, one-quarter helium, no more than 2 percent heavier elements
C) 90 percent hydrogen, 10 percent helium, no more than 1 percent heavier elements
D) one-quarter hydrogen, three-quarters helium, no more than 2 percent heavier elements
E) 98 percent hydrogen, 2 percent helium