A particle with a positive charge sits at rest near the south pole of a magnet as shown below. What is the direction of the magnetic force on the particle? Choose from the answers provided to the right and below the diagram.
A.A
B.B
C.C
D.D
E. Toward the viewer
F. Away from the viewer
T. There is no magnetic force on the particle.
T. There is no magnetic force on the particle.
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Gravitational Force: What is the gravitational force acting on a 59-kg person due to another 59-kg person standing 2.0 m away? We can model each person as a small sphere. (G = 6.67 × 10-11 N ? m2/kg2)
A. 5.8 × 10-8 N B. 8.5 × 103 N C. 1.2 × 10-7 N D. 9.8 × 10-10 N E. 2.0 × 10-9 N
The planet Neptune is blue in color. How would you expect the spectrum of visible light from Neptune to be different from the visible-light spectrum of the Sun?
A) The two spectra would have similar shapes, except Neptune's spectrum would be missing a big chunk of the red light that is present in the Sun's spectrum. B) The two spectra would have similar shapes, except Neptune's spectrum would be missing a big chunk of the blue light that is present in the Sun's spectrum. C) Neptune's spectrum would peak at a much longer wavelength than the Sun's spectrum. D) There is no way to predict the answer to this question, since planets and stars are made of such different things.
What type of glacier is formed when a valley floor is covered with compressed glacial ice?
a. Continental glacier b. Stream glacier c. Valley glacier d. Cirque glacier
Which is the BEST description of what causes tides?
a. Tides are caused by the Moon's gravitational pull on the Earth. b. Tides are caused by earthquakes. c. Tides are caused by the rotation of the Earth. d. Tides are caused by the gravitational pull of the Earth-Moon system. e. Tides are caused by the Earth's gravitational pull on the Moon.