Question

1. When an astronaut is at the surface of planet A, their weight is 700 Newtons. When the same astronaut stands on the surface of planet B, their weight is also 700 Newtons. What do you know for sure about the two planets? Group of answer choices

none of the given answers is correct

the ratio of mass divided by radius squared is the same for both planets.

planets A and B have the same radius

planets A and B have the same mass

2. A 68 kg person is standing 3 meters away from a 2 kg book. What is the force of attraction due to gravity between the person and the book? Group of answer choices

about one milli-Newton

about one nano-Newton

about 1 Newton

zero, there is no force of gravity between small masses

about one micro-Newton

3. When two stars are orbiting each other, the point each star orbits about is. Group of answer choices

none of the given answers is correct

on the surface of the other star

the center of the other star

the center of mass of the other star

the center of mass of the two star system

Answer 1

Please post the other questions separately. Thanks and good luck for your exams:)