Earth is 1 AU away from the sun. This distance stays nearly the same as Earth revolves around the sun. This is because Earth’s orbit is almost circular. Mercury’s orbit is elliptical. What does this mean in regard to Mercury’s distance from the sun?

a

Mercury follows an irregular path around the sun.

b

Mercury’s distance from the sun is always the same.

c

Mercury travels farther from the sun than Earth does.

d

Mercury’s distance from the sun varies in predictable ways.

The graph above shows how the price of cell phones varies with the demand quantity. the equilibrium price for cell phones is where both supply and demand quantities equal $100, 5,000 5,000, $100

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Aroller coaster car is traveling down a track at 22 m/s. the car has a mass of 2000 kg. what is the kinetic energy of the car? a) 22,000 j b) 968,000 j c) 484,000 j d) 44,000 j