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How do the speed and acceleration of the hammer compare with those of the nail at any given time after they are dropped?

See figure 1 in the problem above. If the single slit that produced the image at the top is made narrower, what will happen to the area of red light on the screen seen in the top image?

As the block from the problem above is pushed deeper into the water, what happens to the pressure on the bottom surface of the block?

When the dynamite explodes, what happens to its mass?

All of the protostars in this molecular cloud are about the same distance away. If we were to compare the red and blue main sequence stars that form from these protostars 100,000 years from now, after these protostars have all become main-sequence stars, what would we find?

If you were to gradually increase the frequency of the light wave that produced the images shown above, what would change in the picture shown above?

Global temperatures have increased over the last 100 years. What evidence is there that human activities are at least partially responsible for this increase?

Use this situation to answer the next two questions: Imagine you are on an escalator.   

When two of these positively charged styrofoam packing peanuts are brought closer to each other what happens to the electrical force between them?

Below is a picture of a nearby star-forming molecular cloud in our galaxy. Two southern hemisphere telescopes were used to take the pictures of protostars in this molecular cloud shown below. The next five questions test your understanding of the life of a star. Attributions Images ALMA (ESO/NAOJ/NRAO), J. Tobin; NRAO/AUI/NSF, S. Dagnello; Herschel/ESA. Protostarts in Orion Molecular Clouds [photograph]. (CC BY 3.0). Via NRAO.