Which of the following is true?
a. the earth exerts a gravitational force on the moon, but the moon does not exert a gravitational force on the earth.
b. the earth and moon both exert a gravitational force on each other.
c. the moon exerts a gravitational force on the earth, but the earth does not exert a gravitational force on the moon.
d. the earth and moon do not exert gravitational forces.

True or false: the revolution of the earth creates day and night as it rotates around the sun

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?

Which of the following is the largest disadvantage of about half of the electricity in the united states comes from burning