Answered

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Imagine Two Artificial Satellites Orbiting Earth At The Same Distance. One Satellite Has A Greater Mass Than The Other One? Which Of The Following Would Be True About Their Motion?
A.The satellite with the greater mass is being pulled toward Earth w/ less of a force than the other satellite
B.The satellite w/ the greater mass is being pulled toward Earth w/ a greater force than the other
C.The two satellites are being pulled equal force by the moon
D.The two satellites are being pulled toward Earth w/ equal force

Imagine Two Artificial Satellites w/ Equal Masses Orbiting Earth. One Satellite Is Orbiting Closer To Earth Than The Other Satellite. Which Of The Following Would Be True About Their Motions?
A.The satellite closer to Earth will be pulled toward Earth w/ the same gravitational pull as the other satellite 
B.The satellite closer to Earth will be pulled toward Earth w/ less gravitational pull than the other satellite 
C.Both satellites will be pulled w/ equal force toward the moon
D.The satellite closer to Earth will be pulled toward Earth w/ more gravitational pull than the other satellite

How Will Resistance Change When The Voltage Increases In A Electric Circuit If The Current Remains Constant?
A.It will decrease 
B.It will stay the same
C.It will increase 
D.It will decrease,then increase 

Sagot :

mackiemesser
1. B
It comes from Newton's law of universal gravitation.
,
[tex] F=G\frac{m_{1}m_{2}}{r^2} [/tex]

Where:
F is the force between the masses, (the one we are looking for)G is the gravitational constant,m1 is the first mass (Earth)m2 is the second mass (sattelite)r is the distance between the centers of the masses.As you can see except for m2, all other values are the same.
If mass is bigger the force grows.
2. D.
Again check the formula. The bigger distance, the smaller force. So, closer = bigger force.
3.C It will increase.Ohm's law:
[tex]I= \frac{V}{R} [/tex]
Where:
I is the current.
V is voltage
R is the resistance.
In order for current to remain the same, while voltage increases, the resistance has to increase accordingly.

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