The product of the frequency of a periodic wave times its wavelength gives the ________ of the wave.

Fill in the blank(s) with the appropriate word(s).


speed
velocity

Physics & Space Science

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Light is incident normally from air onto a liquid film that is on a glass plate. The liquid film is 164 nm thick, and the liquid has index of refraction 1.60

The glass has index of refraction n = 1.50. Calculate the longest visible wavelength (as measured in air) of the light for which there will be totally destructive interference between the rays reflected from the top and bottom surfaces of the film. (Assume that the visible spectrum lies between 400 and 700 nm.)

Physics & Space Science

Terminal Voltage and Internal Resistance: A battery has an emf ? = 43.0 V and an internal resistance r = 8.0 ?, as shown in the figure. When the terminal voltage Vab is equal to 34.0 V, the current through the battery, including its direction, is closest to

A. 1.1 A, from b to a. B. 4.2 A, from b to a. C. 1.1 A, from a to b. D. 4.2 A, from a to b. E. 5.4 A, from b to a.

Physics & Space Science

The ratio R at which paint can be sprayed from a spray gun may be expressed as R = a ? t. If R is measured in m3/ s, and time is measured in seconds, what are the units of "a"?

A) m3 B) m3s C) m3 s3 D) m3/s E) m3/s2

Physics & Space Science

An effective way to passively cool a house is to _______

a. open all the windows b. use a light colored roofing material c. use concentrating collectors to provide air conditioning d. add more insulation on the south side of the house e. use thermal storage mass

Physics & Space Science