What do scientists study to figure out how long it takes the Sun to make one rotation on its axis?

A. flares

B. auroras

C. sunspots

D. prominences

What is the Universe made of? try to answer that question! & must have a detailed answer!

Two children (m = 40 kg each) stand opposite each other on the edge of a merry-go-round. The merry-go-round, which has a mass M of 200 kg and a radius of 2.0 m, is spinning at a constant rate of 12 rad/s.

Is the alien theory a scientific claim? Why or why not?

Witch of the following is not an appropriate unit for power

The position of an object is given by x = bt3 a. if x and t are meters and seconds respectively, what are the units of b? b. what is the instantaneous velocity at time t? c. find the average velocity from t = 0 to t = t

Which actions are evidence that a chemical reaction has occurred? Check all that apply. A: a change in color B: the formation of a precipitate C: a clear liquid becoming cloudy D: a change in shape E: the formation of bubbles F: the formation of

Which sphere forms Earth's outermost layer? Atmosphere Biosphere Cryosphere Hydrosphere

an 100kg object traveling at 50m/s collides (perfectly inelastic) with a 50kg object initially at rest. what is the sum of the momentum of both objects prior to the collision?

A train moves at constant velocity of 50km/h. how far will it move in 0.5h?

Which process best describes part of a scientific investigation? O designing a solution O evaluating the conclusion O evaluating the solution O identifying the conclusion