Planck's constant
A) sets an upper limit to the amount of energy that can be absorbed or emitted.
B) sets a lower limit to the amount of energy that can be absorbed or emitted.
C) relates mass to energy.
D) determines the value of the gravitational constant.
B
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Unpolarized light of intensity 
is sent through 4 polarizers, each of the last three rotated 30
from the previous polarizer so that the last polarizer is perpendicular to the first. What is the intensity transmitted by this system?
A. 0.75 
B. 0.50
C. 0.42
D. 0.21
E. 0
Place the three phases of water in order of increasing force of interaction between molecules:
A) ice, water, vapor B) vapor, ice, water C) water, ice, vapor D) vapor, water, ice
Jadeen says that you can increase the resistance of a copper wire by hammering the wire to make it narrower and longer. Arnell says that you can increase its resistance by heating the wire. Which one, if either, is correct, and why?
a. Arnell, because the conductivity of the wire increases when it is heated. b. Arnell, because the conductivity of the wire decreases when it is heated. c. Jadeen, because the conductivity of a wire is directly proportional to its area and inversely proportional to its length. d. Jadeen, because the conductivity of a copper wire does not increase when it is hammered. e. Both are correct because (b) and (d) are both correct.
If a substance is radioactive it is definitely a. dangerous. b. emitting alpha particles. c. glowing. d. useful. e. all of the above. f. none of the above
Indicate whether the statement is true or false