20. The model of the universe that suggests that the sun is the center of the universe was first brought by

A. Copernicus.

B. Brahe.

C. Ptolemy.

D. Kepler.

The density of gold is 19.3 g/cm3. A piece of gold displaces 2 mL of water. The specific gravity of gold is: A. 19.3 B. 38.6 C. 9.6 D. 0.10

During a solar eclipse the Moon is positioned directly between Earth and the Sun. Find the magnitude of the net gravitational force acting on the Moon then, due to both Earth and the Sun. The masses of the Sun, Earth, and the Moon are 1.

By approximately how much does your gravitational potential energy change when you jump

A container has a large cylindrical lower part with a long thin cylindrical neck open at the top. The lower part of the container holds 20.0 m3 of water and the surface area of the bottom of the container is 8.00 m2.

James Joule (after whom the unit of energy is named) claimed that the water at the bottom of Niagara Falls should be warmer than the water at the top, 51 m above the bottom.

Stephen buys a new mop he travels 3 km south and the. 4 km east and then 3km north how far does he need to go to get back. To where he started

The elements with the largest atomic radii are found in the

Students will explain, distinguish the difference between the 4 states of matter

Name one way that a mixture can be separated

The Huka Falls on the Waikato River is one of New Zealand's most visited natural tourist attractions. On average, the river has a flow rate of about 300,000 L/s. At the gorge, the river narrows to 20-m wide and averages 20-m deep.