Explain the theory and practice of two methods of measuring astronomical distances that are based upon different physical principals?

An object becomes positively charged when it loses electrons loses protons gains electrons gains neutrons It it a

Lighter elements are combined to form the sun and stars. what is this process called? What are the two lighter elements? What product come from this reaction?

Ra to He alpha decay reaction

The hormone that produces male secondary sex characteristics is

Anna throws a ball horizontally off her apartment balcony at a speed of 6.0 meters/second. If the ball falls 10 meters from the balcony to the base of the apartment, calculate how long it takes the ball to reach the base

According to the Doppler Effect, which statement is true about a sound as it approaches you and then moves away. A) As the source approaches you, the sound waves are compressed so the pitch of the noise increases.

If you have a beam perfectly balanced on a fulcrum and put a weight at the very end of one side, is there a way to know where you should put a heavier object on the other end?

Most of the Earth's volcanoes occuWhen fossils or minerals form, certain unstable elements are sometimes locked into them.

a man is standing on the edge of a 20.0m high cliff. he throws a rock vertically with an initial velocity of 10.0m/s. how high does the rock go?

The slope of a velocity time graph over any interval of time gives the during that interval