A planet is discovered to orbit around a star in the galaxy ...

[kwoodring]

A planet is discovered to orbit around a star in the galaxy Andromeda, with the same orbital diameter as the Earth around our sun.
 
  If that star has 4 times the mass of our sun, what will the period of revolution of that new planet be, compared to the Earth's orbital period? A) four times as much
  B) one-half as much
  C) one-fourth as much
  D) twice as much
  E) times as much

Question 2

Is it possible for heat to travel from a cold object to a hotter object?
 
  What will be an ideal response?

[nital]

Answer to Question 1

B

Answer to Question 2

Yes (your refrigerator does this all the time), but only with the expenditure of work.

[kwoodring]

Wow, this really help

[31809pancho]

Gracias!