At a given point above Earth's surface, the free-fall ...

[@Brianna17]

At a given point above Earth's surface, the free-fall acceleration is equal to What is the altitude of this point above Earth's surface? (G = 6.67  10-11 N  m2/kg2, Mearth = 5.97  1024 kg, Rearth = 6.38  106 m)
 
  A) 770 km
  B) 970 km
  C) 1500 km
  D) 2000 km
  E) 2400 km

Question 2

If the distance between two charged objects and the charge on each of them are all doubled, the electric force by either one on the other is
 
  A) reduced to one-quarter of the original force.
  B) doubled.
  C) quadrupled.
  D) halved.
  E) unchanged.

[mcabuhat]

Answer to Question 1

A

Answer to Question 2

E

[@Brianna17]

Thanks for the timely response, appreciate it

[mammy1697]

Great answer, keep it coming