The proton-proton chain requires a temperature of 100 million K ...

[EAugust]

The proton-proton chain requires a temperature of 100 million K to get started.
 
  Indicate whether the statement is true or false

Question 2

If we know the size of an asteroid, we can determine its density by
 
  A) comparing its reflectivity to the amount of light it reflects.
  B) looking for brightness variations as it rotates.
  C) determining its mass from its gravitational pull on a spacecraft, satellite, or planet.
  D) radar mapping.
  E) spectroscopic imaging.

[C.mcnichol98]

Answer to Question 1

FALSE

Answer to Question 2

C

[EAugust]

Thanks for the timely response, appreciate it

[ASDFGJLO]

Gracias!