According to your textbook, popular confusion is lessened when applying Heisenberg's uncertainty principle by heeding the distinction between
A) momentum and energy.
B) energy and time.
C) passive observation and probing.
Answer: C
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When viewed from nearby, a black hole in empty space _____
a. has a funnel shape, extending to the event horizon b. glows in X-rays and gamma-rays from superheated surface c. is invisible d. would look like a dark sphere the size of Earth e. emits blackbody radiation only
The size of the electric current in an electrical conductor is a function of which of the following?
a. velocity of charge carriers b. conductor cross-sectional area c. density of charge carriers d. All of the above choices are valid.
The unit of electric resistance, the ohm, is equivalent to which of the following?
a. V/A b. V?m c. A/s d. A/m
In a single-slit diffraction experiment, the width of the central maximum is 6.0 mm. The width of the slit is then doubled as is the distance to the screen. What is the resulting width of the central maximum?
a. 12 mm c. 24 mm b. 6.0 mm d. 3.0 mm