Question

HELP ASAP

this is for science, and if i get the questions right, I pass, but the teacher never taught us the lesson, idrk y. so i really need help:( Im giving away 20 points so please give me your best answers ;)


1. As an astronaut travels from the surface of Earth to a position that is four times as far away from the center of Earth, based on the Law of Gravity which of the following statement is true?


a. mass remains the same and the gravitational pull from Earth decreases

b. weight remains the same and the gravitational pull from Earth changes

c. weight increases and the gravitational pull from Earth stays the same

d. mass decreases and the gravitational pull from Earth increases

2. A satellite is sent into orbit around the Earth, In which of the following situation would the gravitational force be the greatest?


A. 1200 lb satellite orbiting 150 miles above Earth’s surface

b. 850 lb satellite orbiting 150 miles above Earth’s surface

c. 850 lb satellite orbiting 1500 miles above Earth’s surface

d. 1200 lb satellite orbiting 1500 miles above Earth’s surface


3. High and low tides are the regular pattern of rising and sinking ocean-water levels. They are caused when the sun’s gravity and the moon’s gravity pull on ocean water. The moon’s gravity has a greater effect on Earth’s oceans than the sun’s gravity. Why would the moon have a greater effect than the sun?


a. The moon has less mass than the sun.

b. The moon is closer to Earth than the sun.

c. The moon is not as hot as the sun.

d. The moon has less mass than Earth.



4. Which statement about the universality of gravity is false?


a. The gravitational force between two objects depends only on their masses.

b. Any two objects that have mass also have a force of gravity acting between them, no matter how far apart they are.

c. The gravitational force between two objects increases if the objects move closer together.

d. The gravitational force between two objects increases if mass is added to one object.

Answer 1

1)a- mass never changes as you move from the earth

2)actually am not sure I haven't been taught that too

3)b

4)a-it doesn't depend only on mass but also weight