A thin uncharged conducting spherical shell has a charge q carefully placed at its center through a small hole in the shell. The charge q does not touch the shell. What is the charge on the shell?
a. 2q
c. q
b. 0
d. -q
B
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Work and Power: The torque required to turn the crank on an ice cream maker is 4.50 N ? m. How much work does it take to turn the crank through 300 full turns?
A. 4240 J B. 8480 J C. 2120 J D. 1350 J E. 2700 J
Most spiral galaxies have rotation curves that
A) decrease rapidly with increasing radius in the disk, indicating no dark matter is present. B) increase drastically with increasing radius. C) decrease rapidly with increasing radius in the disk, indicating the presence of dark matter. D) stay constant out to large radii in the disk, indicating that no dark matter is present. E) stay constant out to large radii in the disk, indicating the presence of dark matter.
When an electron in H changes its spin from the same to the opposite direction as the proton, it:
A) emits an X-ray photon. B) absorbs a radio wave photon. C) emits a radio wave photon. D) absorbs a visible light photon. E) neither emits nor absorbs a photon.
The following reaction is used to make the polymer described below. What is the other starting material?
A) HOCH2CH2OH B) H2O C) HOCH2CH3 D) H2CI=CH2 E) HOCH2CH2CH2CH2OH