What information is needed to calculate the mass of Jupiter?
A) the orbital period and distance of Jupiter's orbit around the Sun
B) the orbital period and distance of one of Jupiter's moons
C) the orbital speed of one of Jupiter's moons
D) the Sun's mass and how Jupiter's speed changes during its elliptical orbit around the Sun
E) the Sun's mass and the average distance of Jupiter from the Sun
B) the orbital period and distance of one of Jupiter's moons
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A 72 nC charge is located at x = 3.00 m on the x-axis and an 8.0 nC charge is located at x = 7.0 m. At what point on the x-axis is the electric field zero?
A. - 9.0 m B. 4.0 m C. -5.0 m D. 6.0 m E. 6.3 m
Spiral arms are obvious—easily-seen features—because they contain ____
a. dense molecular clouds b. atomic hydrogen clouds c. sun-like stars d. OB associations e. supernovae
A slit of variable width illuminated by light of wavelength ? is widened until the first order diffraction minimum moves out to a distance infinitely far away from the brightest location in the central maximum. In terms of the wavelength, the width of the slit is then
A.
B.
.C.
D.
.E.
In the process of pair-creation by a high-energy photon, matter is
A) conserved. B) destroyed. C) created.