You are in a spaceship traveling away from earth. You and Mission Control on earth agree that the +x direction is the direction in which your ship is traveling relative to the earth. If you choose your own frame to be the Home Frame (so that the earth is the Other Frame), what is the sign of ?, according to the convention established in this chapter?
A. Positive
B. Negative
C. We are free to choose ? to have either sign.
B. Negative
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Exhibit 17-3Four wave functions are given below. I.y(x, t) = 5sin(4x- 20t + 4) II.y(x, t) = 5sin(3x- 12t + 5) III.y(x, t) = 5cos(4x + 24t + 6) IV.y(x, t) = 14cos(2x- 8t + 3)Use this exhibit to answer the following question(s). Refer to Exhibit 17-3. Rank the wave functions in order of the magnitude of the wavelengths, from least to greatest.
A. IV, II, I, III B. IV, I, II, III C. I, II, III, IV D. IV, II, III = I E. I = III, II, IV
If an irregularly shaped object (such as a wrench) is dropped from rest in a classroom and feels no air resistance, it will
A) accelerate but will not spin. B) accelerate and turn until its center of gravity reaches its lowest point. C) accelerate and turn about its center of gravity with uniform angular speed. D) accelerate and turn about its center of gravity with uniform angular acceleration. E) accelerate and spin until its center of gravity reaches its highest point.
What holds the Sun together?
A. quantum forces B. the pressure of the solar wind C. radiation pressure D. the Sun's magnetic field E. the Sun's gravity
The magnetic fields in sunspots can be detected by the fact that some lines in the spectrum of a gas split into two or more lines by the action of magnetic fields.
Answer the following statement true (T) or false (F)