When astronomer vera rubin began to measure the rotation curves of spiral galaxies in the 1960s, she found?

Suppose that a wave forms in shallow water. The depth of the water d (in feet) and the velocity of the wave v (in feet per second) are related by the equation v = sqrt 32d. If a wave forms in water with a depth of 8.5 feet, what is its velocity?

A 500 kilogram marlin and a 20 kilogram salmon are swimming at the same velocity. How does the momentum of the two fish compare? A. The marlin has more momentum. B. The salmon has more momentum. C. Both have the same momentum. D.

The sun is sometimes described as an average star. is that true? what is the average star really like?

Why are strong forces able to hold atomic nuclei together?

What should you do after handling chemicals in the lab

Which sentence states Newton's third law? If two objects collide, each object exerts a force in the same direction as the other. If two objects collide, each object exerts a force equal to and in the opposite direction of the other.

Why did the chicken cross the road.

A 98.1 kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.69 rad/s. A monkey drops a 9.29 kg bunch of bananas vertically onto the platform.

7. A type of non-renewable energy would be: O wind O petroleum O water solar

A refrigerator is a system. The energy input into the refrigerator system (in the form of electricity) is the same as the amount of energy output from the system. Which of the following best describes the energy output of the system?