You see a penny sitting on a turntable rotating with constant speed. How many forces are acting on the penny? a. The friction force of the turntable on the penny pointing inward towards the center.
b. The downward force of the earth on the penny and the upward force of the turntable on the penny.
c. The centripetal force.
d. The downward force of the earth on the penny, the upward force of the turntable on the penny. and the inward friction force of the turntable on the penny.
e. The downward force of the earth on the penny.

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?

What is an example of static friction

Geologists get to play with chemistry, physics, and history! and what a history you will meet as youwork your way through the course. starting at the beginning, the textbook provides the scientifically acceptedstart of the and promises that you'll get to explore some of the evidence for that scientific view, later inthe semester. meanwhile, which is more nearly correct of the scientifically accepted view? a) the earth formed when the big bang caused older materials to fall together, about 14 billion years ago. b) the earth formed from the falling together of older materials, about 4.6 billion years ago. c) the earth formed in the big bang, about 6000 years ago. d) the earth is eternal, having been here forever and promising to be here forever. e) the earth was assembled by gigantic space beavers, which gnawed down the primordial tree of life andpiled its branches together to form the planet.