If a wave has a wavelength of 25.4 cm and a frequency of 1.63 kHz, its speed is closest to
A) 0.414 m/s
B) 41.4 m/s
C) 414 m/s
D) 41,400 m/s
E) 15.6 m/s
C
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Radioactivity Basics: A radioactive isotope of atomic number Z emits a beta-minus particle, and then the daughter nucleus emits a gamma ray. What is the atomic number of the resulting nucleus after both processes?
A. Z - 1 B. Z + 1 C. Z - 2 D. Z - 3
Which planet(s) have an atmosphere that consists mostly of carbon dioxide?
A) Venus and Mars B) Venus, Earth, and Mars C) Venus only D) Mars only
If ? = 8.0 V, at what rate is that emf providing energy to the circuit shown below?
a.
8.4 W
b.
7.6 W
c.
5.6 W
d.
11 W
e.
2.0 W
A solid conducting sphere of 10 cm radius has a net charge of 40 nC. If the potential at infinity is taken as zero, what is the potential at the center of the sphere?
a. 360 mV c. >3.6 × 10^4 V b. 3.6 × 10^3 V d. 36 mV