Which major figure in the history of astronomy developed laws of gravitational forces and motion, making extremely accurate calculations and predictions possible?

a. Brahe

b. Kepler

c. Galileo

d. Newton

A force is applied with a magnitude of 70 N at an angle of 50 degrees from the horizontal. What are the horizontal and vertical components of force?

The law of universal gravitation (gravity) describes two factors that affect the force of gravity between objects. What two factors affect gravity AND how?

Which two terrestrial planets have atmospheres with similar compositions? a. mars and venus b. venus and mercury c. mars and mercury d. earth and venus

What is true about an iceberg and the water surrounding the iceberg? A. They are in thermal equilibrium. B. The water has a lower temperature than the iceberg. C. The iceberg has a lower temperature than the water. D.

Identify the method of thermal energy transfer at work in hot air balloons. Explain how thermal energy is transferred in this scenario.

A massive and a less massive object free-fall at the same rate because A. the ratio of the net force to mass is the same for each B. the gravity is the same C. they weigh the same amount D. they experience the same force of gravity E. none

Which of the following lists the Earth's layers in order from hottest to coldest in temperature? A. outer core, mantle, inner core, crust B. crust, mantle, outer core, inner core C. inner core, outer core, mantle, crust D.

A boy does 465 J of work pulling an empty wagon along level ground with a force of 111 N [31o below the horizontal]. A frictional force of 155 N opposes the motion and is actually slowing the wagon down from an initial high velocity.

Which of the following best explains why the tidal bulges on Earth are larger closest to the Moon compared to the tidal bulges closest to the Sun?

an airplane flies with a constant speed of 600 miles per hour. how long will it take to travel a distance of 2100 miles?