Hydrogen and helium in the universe were formed by which of these phenomena?
a. big bang
b. fusion in small stars
c. fusion in very large stars
d. supernova

Evaluate this exponential expression,8. (2 + 3)2 – 42

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3