Which of the following statements provide evidence to support the big bang theory? Select the two correct answers. Small spiral galaxies become larger elliptical galaxies when they collide.

Dark matter makes up the majority of matter in the galaxy.

The ratios of hydrogen and helium in the universe match those of the early universe.

The universe began as a very high density singularity.

An automobile of mass 2000 kg moving at 30 m/s is braked suddenly with a constant braking force of 10000 n. how far does the car travel before stopping?

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

The discovery of the electron as a subatomic particle was a result of