The idea of a field was needed for which reason

#1) The idea of a field was needed for which reason?
A) There was no way to calculate forces
B) Forces were exerted without physical contact
C) There was no way to know the direction of forces
D) Forces affect only certain things.

#8) A weather satellite is launched from the ground and placed in orbit six times father away from the earths centre. The gravitational field experienced by the satellite in orbit is ____ the field that is experienced on the ground?

A) six times
B) one sixth of
C) thirty-six times
D) one thirty-six of

#10) Mercury has a massof 3.30 X 10(-23)kg * -negative 23 to the power
and a radius of 2.44X 10 (6)m * to the power of 6 . Find the Mercury's gravitational field strength. Show your work ( formula, substitution, and answer ( rounded correctly and with the appropriate unit)