On a surface of a planet of radius R and mass M the acceleration due to gravity is 7m/s?. Consider another planet of radius 2R and mass 0.4M. What would the acceleration due to gravity be on this new planet? Show your calculations.

0.7 m/

Explanation:

From Newton's law of universal gravitation,

F =

and from Newton's second law of motion,

F = mg

So that;

mg =

⇒ g =

For the first planet,

7 =

⇒ G = .............. 1

For the second planet,

g =

   =

⇒ G = ............. 2

Equating 1 and 2, we have;

=

g =

  =

  =

g = 0.7

Therefore, the acceleration due to gravity on the new planet is 0.7 m/.

explanation:

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evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

it has to be b, about 97 percent.