The formula for energy of motion is KE = .5 x m x v^2
Ke= Kinetic Energy in Joules
m = Mass in Kilograms
v = Velocity in Meters per Second
The correct answer is
C ). A hypothesis includes an explanation for why two variables affect each other, but a law only describes how they affect each other.
The formula for the force of gravity has ( M₁ · M₂ / D² ) in it.
After the changes, the new force will have ( 0.5M₁ · 0.5M₂ / (0.5D)² ) .
We can separate the new numbers from the original force, like this:
( 0.5M₁ · 0.5M₂ / (0.5D)² )
= ( 0.5 · 0.5 / (0.5)² ) times ( M₁ · M₂ / D² )
The first factor boils down to ' 1 '. So, those changes would
leave the strength of the force unchanged.
That's what I think.
A, the statement is incorrect
Because there's no such thing as "really" moving.
ALL motion is always relative to something.
Here's an example:
You're sitting in a comfy cushy seat, reading a book and listening
to your .mp3 player, and you're getting drowsy. It's so warm and
comfortable, your eyes are getting so heavy, finally the book slips
out of your hand, falls into your lap, and you are fast asleep.
-- Relative to you, the book is not moving at all.
-- Relative to the seat, you are not moving at all.
-- Relative to the wall and the window, the seat is not moving at all.
-- But your seat is in a passenger airliner. Relative to people on the
ground, you are moving past them at almost 500 miles per hour !
-- Relative to the center of the Earth, the people on the ground are moving
in a circle at more than 700 miles per hour.
-- Relative to the center of the Sun, the Earth and everything on it are moving
in a circle at about 66,700 miles per hour !
How fast are they REALLY moving ?
There's no such thing.
It all depends on what reference you're using.
