Which of these properties describes a metal?
A) conducts heat very well
B) brittle
C) fragile
D) transparent
E) doesn't conduct electricity very well
Answer: A
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What do astronomers typically refer to as "heavy elements"?
A) elements that are heavier than iron B) elements that are heavier than carbon C) elements that are heavier than uranium D) elements besides hydrogen and helium
As an object moves from point A to point B only two forces act on it: one force is nonconservative and does -30 J of work, the other force is conservative and does +50 J of work. Between A and B,
a. the kinetic energy of object increases, mechanical energy decreases. b. the kinetic energy of object decreases, mechanical energy decreases. c. the kinetic energy of object decreases, mechanical energy increases. d. the kinetic energy of object increases, mechanical energy increases. e. None of the above.
In a Young's double slit experiment, a 5th order maximum occurs at an angle of 
If the screen is 3.90 m from the slits and the slit separation is 0.135 mm, what wavelength is being used?
A. 335 nm B. 670 nm C. 476 nm D. 589 nm E. 690 nm
In the atom:
a. the positively charged nucleus attracts the negatively charged electrons. b. the negatively charged nucleus attracts the positively charged electrons. c. the strong nuclear force counteracts the attraction between the electrons and the nucleus. d. the electrical forces do not act within atoms. e. the nucleus and the electrons can either both be positive or both be negative.