Process of Science: Observations of asteroids, comets, and meteorites help refine the theory of the formation of the solar system
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A proton moving at a speed of 3.8 × 10^6 m/s cuts across the lines of a magnetic field at an angle of 40°. The strength of the field is 0.25 × 10^-4 T. What is the magnitude of the force acting on the proton? (qp = 1.6 × 10^-19 C)
a. 1.4 × 10^-17 N c. 9.8 × 10^-18 N b. 2.3 × 10^-17 N d. 5.1 × 10^-18 N
An object is placed at a concave mirror's center of curvature. The image produced by the mirror is located
A) out beyond the center of curvature. B) at the center of curvature. C) between the center of curvature and the focal point. D) at the focal point. E) between the focal point and the surface of the mirror.
A plot of the continuous spectra of five different stars is shown in Figure 6-1. Based on these spectra, which of the stars is the hottest?
Work done by a force on an object can be a positive or a negative quantity
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