Components: The x and y components of a vector in a horizontal plane are 4.00 m and 3.00 m, respectively.(a) What is the magnitude of this vector?(b) What angle does this vector make with the positive +y-axis.
Fill in the blank(s) with the appropriate word(s).
(a) 5.00 m (b) 53.1°
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Vision Problems: Nearsightedness is usually corrected with
A. converging lenses. B. diverging lenses. C. convex mirrors. D. cylindrical lenses. E. concave mirrors.
Most of the galaxies in the Local Group are:
A) big spirals like our Galaxy and M31. B) small spirals like M33 and the LMC. C) small irregulars like the Magellanic Clouds. D) active galaxies like Centaurus A. E) small ellipticals like the companions to M31 in Andromeda.
When a car decelerates, its front end goes down. Explain
What will be an ideal response?
You are traveling in a space ship at half the speed of light (0.5c) directly toward an oncoming photon traveling at the speed of light (c). At what speed would you see the photon coming toward you?
A) c B) 0.25c C) 1.5c D) 0.5c