9. The model of the universe that suggests that the sun is the center of the universe was first developed by

A. Copernicus

B. Brahe.

C. Kepler.

D. Ptolemy.

Inside the gym a mile is 19.7 laps or Laps around the gym

The coaster begins with a nearly 2.9 second free fall along a 90 degree drop. What is the speed?

The width of a particular microwave oven is exactly right to support a standing-wave mode. Measurements of the temperature across the oven show that there are cold spots at each edge of the oven and at three spots in between.

The scientific principle which explains the observation that the amount of heat transfer accompanying a change in one direction is numerically equal but opposite in sign to the amount of heat transfer in the opposite direction is:

Which of these waves requires a medium to travel through light wave electromagnetic waves sound wave microwave

Imagine a 15 kg block moving with a velocity of 20 m/s to the left. Calculate the kinetic Energy of this block. Show the equation, your work, and the answer with units:

Brainliest (02.02 LC) What is most likely to happen during erosion? Carrying away of sediments to distant places Settling down of sediments in new locations Dissolving of rocks by chemicals in water Wearing of rocks by wind-blown sand

Recall that the previous hint stated that the magic number is 15*x, where x is a number between 1 and 10. Specifically x is an even number between 1 and 10. Try to guess the value of x.

What is the electric potential of a 2.2 µC charge at a distance of 6.3 m from the charge? Recall that Coulomb's constant is k = 8.99 * 109 N • ___ V What is the electric potential at a distance of 99 m from the charge?___ V

A skier is traveling down a slope that is inclined 30° above the horizontal. The coefficient of kinetic friction between the skier and the slope is 0.10. Which of the following best describes the acceleration of the skier? A) It is zero.