We don't know WHY there are gravitational forces that attract everything
to everything else.
We DO know that the more mass is involved, the stronger the forces are,
and we know that if an object had no mass then it wouldn't be affected by
gravity. So you could say that it's MASS that gives an object gravity, and
the more mass the object has, the more gravity it has.
"Weight" is the gravitational attraction between you and something else.
In our daily life, it's always the gravitational attraction between us and
the Earth. But when a person or an object is on the moon or a different
planet, then the "something else" is something else ... not the Earth.
On the moon, the weight of anything is about 17% of its Earth-weight.
The correct answer is not listed among the choices.
m = w/g
m = 1,125 / 9.8
m = 114.8 kilograms
Answer:
Hipparchus was an ancient Greek who classified stars based on the brightness in 129 B.C. He grouped the brightest stars and ranked them 1 (first magnitude) and dimmest stars as 6 (sixth magnitude). Thus, the smaller numbers indicated brighter stars. Now, the scale extends in negative axis as well. More the negative number, brighter is the star. For example, Sun has magnitude -26.74.
This the apparent magnitude which means the classification is based on the brightness of the star as it appears from the Earth.