North, south, east, and west are points on the _____________ of your local sky
Fill in the blank(s) with correct word
horizon
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The force on a current-carrying wire in a magnetic field is the strongest when
A) the current is parallel to the field lines. B) the current is at a 30° angle with respect to the field lines. C) the current is at a 45° angle with respect to the field lines. D) the current is at a 60° angle with respect to the field lines. E) the current is perpendicular to the field lines.
Arcturus has an mV = –0.04 and MV = –0.3 . Its distance is 10^–3.4 pc
a. True b. False Indicate whether the statement is true or false
A pipe of diameter three cm is replaced by one of the same length but of diameter six cm. If the pressure difference between the ends of the pipe remains the same, by what factor is the rate of flow of a viscous liquid through it changed?
a. 2 b. 4 c. 8 d. 16 e. 32
Two thin lenses have powers P1 and P2, measured in diopters. If these lenses are placed in contact with one another, the resulting power is
a. more than both P1 and P2. b. less than both P1 and P2. c. half-way between P1 and P2. d. P1 + P2.