Question

1. what term describes earths placement in its orbit when it is closest to the sun? (1pt) a. aphelion b. artemis c. perihelion d. proportional 10) gravitational force between two masses f = gm_1m_2/r^2. imagine the earth doubles in mass. what would happen to the force between the sun and the earth? (1pt) a. it will double b. it will quadruple c. it will be halved d. it will be quartered 11) gravitational force between two masses f = gm_1m_2/r^2. imagine the earth is moved (yes, by aliens) to a distance of 4au from the sun. what would happen to the force between the sun and the earth? (1pt) a. it will decrease by a factor of 16 b. it will decrease by a factor of 4 c. it will increase by a factor of 4 d. it will increase by a factor of 16

Explanation:

Question 9

The point in Earth's orbit where it is closest to the Sun is called the perihelion. Aphelion is the point where Earth is farthest from the Sun. Artemis is a Greek - goddess and not related to Earth's orbital points. "Proportional" is not a term for Earth's orbital position.

Question 10

The gravitational force between two masses is given by $F = \frac{Gm_1m_2}{r^2}$. If the mass of the Earth ($m_1$) doubles while the mass of the Sun ($m_2$) and the distance $r$ remain the same, the force $F$ will double since $F$ is directly proportional to the mass of one of the objects when other factors are constant.

Question 11

The gravitational force between two masses is $F=\frac{Gm_1m_2}{r^2}$. If the Earth is moved to a distance of 4 times the original distance ($r$ becomes $4r$) from the Sun, the new force $F_{new}=\frac{Gm_1m_2}{(4r)^2}=\frac{Gm_1m_2}{16r^2}$. So the force will decrease by a factor of 16.

Answer:

1. B. Perihelion
2. A. It will double
3. A. It will decrease by a factor of 16