What is the term that refers to horizontal air motions?
a. Gust
b. Wind
c. Isobar
d. Squall
Answer: b. Wind
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Brewster's Angle: What is Brewster's angle for light traveling in vacuum and reflecting off a piece of glass having a refractive index of 1.52?
A. 48.9° B. 33.3° C. 48.1° D. 56.7° E. 41.1°
100 grams of molten lead (600°C) is used to make musket balls. If the lead shot is allowed to cool to room temperature (21°C), what is the change in entropy (in J/K) of the lead? (For the specific heat of molten and solid lead use 1.29 J/g/°C; the latent heat of fusion and the melting point of lead are 2.45 × 10^4 J/kg and 327°C.)
a. ?145 b. ?252 c. ?302 d. ?429 e. ?100
Angular Momentum: A 24.5-kg child is standing on the outer edge of a horizontal merry-go-round that has a moment of inertia of 989 kg ? m2 about a vertical axis through its center and a radius of 2.40 m. The entire system (including the child) is initially rotating at 0.180 rev/s. Find the angular velocity if the child moves to a new position 1.10 m from the center of the merry-go-round.
Fill in the blank(s) with the appropriate word(s).
Induced electric and magnetic fields result in
A) electromagnetic waves. B) stronger electric or magnetic fields. C) higher voltages produced by Faraday induction. D) all of the above E) none of the above