Two harmonic waves are described by 
What is the magnitude of the speed (in m/s) of the two traveling waves?
A. 16
B. 4.0
C. 8.0
D. 0.25
E. 2.0
Answer: D
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Which of the following transitions within an atom is not possible?
A) An electron begins in an excited state and then gains enough energy to jump to the ground state. B) An electron begins in the ground state and then gains enough energy to jump to an excited state. C) An electron begins in the ground state and then gains enough energy to become ionized. D) An electron begins in an excited state and then gains enough energy to become ionized.
The Heisenberg uncertainty principle states that
A) Planck's constant sets a limit on accuracy of measurements. B) we can't simultaneously measure exactly both the position and momentum of a particle. C) we can't simultaneously measure exactly a particle's energy and time having that energy. D) all of the above
Three resistors, each with resistance R1, are in series in a circuit. They are replaced by one equivalent resistor, R. Comparing this resistor to the first resistor of the initial circuit, which of the following is true?
a. The voltage across R equals the voltage across R1. b. The current through R equals the current through R1. c. The power given off by R equals the power given off by R1. d. R is less than R1.
Radioactivity Basics: An ? particle is also known as
A. an electron. B. a positron. C. a helium nucleus. D. a high-energy photon.