In modern astronomy, an interferometer
a. is the highest resolution optical telescope ever built.
b. is located in Arecibo, Puerto Rico.
c. is a set of optical telescopes linked together to provide very high resolution.
d. is a set of radio telescopes linked together to provide very high resolution.
e. is either a set of optical telescopes linked together to provide very high resolution or is a set of radio telescopes linked together to provide very high resolution.
e
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A single circular (radius = R) loop of wire is located in the yz plane with its center at the origin. The loop has a clockwise current as seen from the point (+R, 0, 0). The direction of the magnetic field at the point
a. (0, 0, 0) is ?i and at the point (+R, 0, 0) is ?i. b. (0, 0, 0) is ?i and at the point (0, +2R, 0) is ?i. c. (0, 0, 0) is +i and at the point (+R, 0, 0) is +i. d. (0, 0, 0) is +i and at the point (0, +2R, 0) is +i. e. None of the above
When Mary is 3.00 m from the center of a merry-go-round, her tangential speed is a constant 1.88 m/s
(a) What is her angular speed in rad/s? (b) What is the magnitude of her linear acceleration? What will be an ideal response?
A spacecraft (mass = m) orbits a planet (mass = M) in a circular orbit (radius = R). What is the minimum energy required to send this spacecraft to a distant point in space where the gravitational force on the spacecraft by the planet is negligible?
a. GmM/(4R) b. GmM/R c. GmM/(2R) d. GmM/(3R) e. 2GmM/(5R)
The energy transformation that occurs during downhill skiing is
A) kin E ? grav E. B) chem E ? kin E + therm E. C) kin E ? grav E + therm E. D) grav E ? chem E. E) grav E ? kin E + therm E.