The y-component of the electric field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation
Ey = (375 N/C) cos[kx - (2.20 × 1014 rad/s)t]. (c = 3.0 × 108 m/s)
(a) What is the largest that the x-component of the wave can be?
(b) What is the largest that the z-component of the wave can be?
(a) zero (b) 1.25 µT
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The mass of a visual binary pair of stars can be obtained from
a. the time in years for them to orbit one another. b. the size of their orbit. c. their apparent magnitudes. d. both the time in years for them to orbit one another and the size of their orbit.
Which units are appropriate for measurement of apparent brightness?
A) watts per square meter B) watts C) joules D) newtons
A soap bubble film that is 106 nm thick and has an index of refraction of 1.42 results in constructive interference in the reflected light if this film is illuminated by a beam of light with a wavelength of 601 nm
What are the next three thicknesses of this film that will also result in constructive interference? A) 53.0 nm, 35.3 nm, 26.5 nm B) 67.0 nm, 42.4 nm, 22.3 nm C) 212 nm, 424 nm, 636 nm D) 212 nm, 318 nm, 424 nm E) 318 nm, 530 nm, 742 nm
The purchase by a power company of an area of ground on which to build a power plant is an example of the tragedy of the commons
What will be an ideal response?