If y = 0.02 sin (30x - 400t) (SI units), the frequency of the wave is
a. 30 Hz
b. 15/p Hz
c. 200/p Hz
d. 400 Hz
e. 800p Hz
C
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Estimate the solid angle from area A1, subtended by area A2 as shown, as area A1 moves from position i to position ii to position iii. That is, determine ?12,i , ?12,ii , and ?12,iii .
Answer the following statement(s) true (T) or false (F)
1. The continuity principle still applies to dynamic electromagnetic fields.
This figure shows idealized thermal radiation spectra from several stars and a human. Based on this graph, at about what wavelength does a 15,000 K star emit its most intense light?
A) about 100 nanometers B) about 1,000 nanometers C) about 20 nanometers D) about 100,000 nanometers
A pepperoni pizza has 2.80 megacalories. Juan eats exactly 1/3 of the pizza. How many kilocalories has he consumed? (One food "calorie" is actually a kilocalorie.)
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