Whose contributions to astronomy explained how planets were held in their orbits?

A. Aristotle

B. Copernicus

C. Ptolemy

D. Newton

E. Brahe

F. Kepler

A ladybg in the bottom of a whirling tin can feels a centrifugal force pushing it against the bottom of the can.

How long have advances in astronomy been occurring? Only for the past few years Only for the past decade Only for the past century For the past few centuries

Before a star is born, the matter that will become the star exists as a A bright, explosive supernova Bred giant C black hole D cool, dark nebula

A moving truck has more __ energy than a parked truck

Which example describes and nonrenewable resource? A. everyone in our neighborhood uses solar panels to generate electricity to run their pool pumps. B.

How was dyslexia treated in the past and how is dyslexia treated today?

The work of Charles Kuen Kao is likely to have been most influenced by the work of which of the following scientists? A. Galileo Galilei B. Christian Doppler C. Sir Isaac Newton D. Ibn al-Haytham

Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35 km/h to 40 km/h the first second and from 40 km/h to 45 km/h the next second. What is the car acceleration?

Why can crevasses in glaciers only be 50 meters deep? A. Plastic flow occurs below that depth. B. Glaciers cannot be thicker that 50 Meters. C. Surges prevent plastic flow below that depth. D. Basal slip occurs below that depth.

What are the changes to Earth's surface that occur as a result of plate movement