The nuclei of radioactive isotopes can sometimes give off
A) visible radiation
B) UV rays
C) gamma rays
D) X-rays
C
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Simple Pendulum: What is the length of a simple pendulum with a period of 2.0 s?
A. 20 m B. 0.99 m C. 1.2 m D. 1.6 m E. 0.87 m
When hydrogen reacts with ethene, what is the product?
a. Cycloethene b. Ethane c. Propene d. Ethyne e. Methane
Alternating zones of rising and sinking gas in Jupiter's atmosphere:
A) create light and dark bands. B) cause Jupiter's magnetic field to ripple. C) produced the ring system discovered by Voyager. D) generate their own magnetic fields. E) circle the planet from pole to pole.
Harry Potter points his wand at the sun and cries “Spotificus!” Within 8 minutes, observers all over the earth see a large string of sunspots form on the sun. Did Harry create the sunspots?
A. Yes. Harry is a very powerful wizard. B. Yes, if magical effects travel at the speed of light. C. No. This is not physically possible, even with magic.