Which of these assumptions is Ptolemy's model of planetary motion based on?

The sun moves around the earth.

The earth moves around the sun.

The stars do not move.

The earth is flat.

Which term is defined as an investigative process that recognizes that scientific concepts and models are only valid if their predictions agree with experimental results?

From the edge of a rooftop, you toss a green ball upward with an initial velocity of 10 m/s and a blue ball downwards with the same initial speed. Air resistance is negligible. When they reach the ground below a.

What are the dimensions of the rectangle

When a ball increases in speed by the same amount each second its acceleration?

You input 75 J of work with a wedge. If the wedge does 65 J of useful work, what if the efficiency of the wedge?

The maximum kinetic energy of photoelectrons is 3.10 ev. when the wavelength of the light is increased by 50%, the maximum energy decreases to 1.50 ev. part a what is the work function of the cathode?

Which of the following most completely describes an objects motion? A. a car travels 25 miles. B. The baby crawls 10 feet in 15 seconds toward the door. C. A marble rolls 10 m to the left D. The rain falls at a rate of one inch per hour

Why is the use of carbon-14 limited

Why do cell sometimes need to use active transport?

Why is carbon and nitrogen important?