Short-period comets, such as Halley's comet, are believed to come from ______________
a. the Kuiper Belt
b. the Oort cloud
c. the asteroid belt
d. Earth
a
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Which of the following is a property of light waves and NOT of sound waves?
A) frequency B) wavelength C) amplitude D) polarization E) none of the above
A torque of 12 N • m is applied to a solid, uniform disk of radius 0.50 m, causing the disk to accelerate at 5.7 rad/s2. What is the mass of the disk?
A) 17 kg B) 13 kg C) 8.5 kg D) 4.3 kg
The "Local Bubble" is:
A) created by our Sun's solar wind, and extends well past Pluto's orbit. B) created by the bipolar jets of the young Sun, perpendicular to the ecliptic. C) about 100 pcs. across and transparent to extreme ultraviolet radiation. D) the region around the Milky Way where we can trace out its magnetic field. E) the cluster of galaxies our Milky Way and M-31 in Andromeda belong to.
Charge of uniform density (20 nC/m2) is distributed over a cylindrical surface (radius = 1.0 cm), and a second coaxial surface (radius = 3.0 cm) carries a uniform charge density of -12 nC/m2 . Determine the magnitude of the electric field at a point 4.0 cm from the symmetry axis of the two surfaces
a. 0.45 kN/C b. 1.0 kN/C c. 0.73 kN/C d. 0.56 kN/C e. 2.3 kN/C