The planet neptune has a mass of 1.02 x 10^26 kg, and earth's mass is 5.97 x 10^24 kg. what is the gravitational force between the planets when they are 4.5 billion kilometers apart?

A: 2.0 x 10^15

B: 2.0 x 10^21

C: 3.0 x 10^25

D: 3.0 x 10^31

A balloon is released 15 feet away from an observer. The balloon is rising vertically at. a rate of 2 ft/sec and at the same time the wind is carrying it horizontally away from the observer at a rate of 3 ft/sec.

A ball is dropped from rest from the top of a building. what force is responsible for the downward motion of the ball?

Which of the following objects has the greatest kinetic energy? a baseball flying through the air at 20 miles per hour a baseball flying through the air at 90 miles per hour a baseball sitting on the ground a baseball flying through the air at 45

What is the net force on a bag pulled down by gravity with a force of 18 newtons and pulled upward by a rope with a force of 18 newtons?

When a magnet is dropped why does it lose its magnetic properties

What are sun spots?

Identify characteristics of objective personality tests. -self-report -scientific -paper-and-pencil -questions about behavior -objective -potentially biased answers Multiple Choice-Psychology

The Pony Express was a mail delivery system in the Old West that used a series of men on horseback to deliver mail from St. Joseph, MO to Sacramento, CA along a trail that was 2000 miles long.

In the virtual lab, calculations were made of the predicted diffraction angle, using the formula θ ≈ StartFraction lambda over L EndFraction.

What trends were seen in Mendeleev's periodic table?