12) How much work is done if a machine exerts 850 watts of power in 30 seconds?
A)
28.3]
B)
283)
2550J
D)
25,500J

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

What happens to an isotope during radioactive decay?

To fully describe the photoelectric effect, scientists must consider which of the following to be quantized? o a. both light and matter o b. matter only o c. light only o d. neither light nor matter