The most luminous objects known in the universe are
A) Seyferts.
B) quasars.
C) blazars.
D) radio lobe galaxies.
E) giant ellipticals.
B
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By locating the north celestial pole (NCP) in the sky, how can you determine your latitude?
A) The altitude of the NCP is your angular distance from the North Pole. B) The direction of the NCP is the angular distance from the North Pole. C) The direction of the NCP is the same as your latitude. D) The altitude of the NCP is the same as your distance from the North Pole. E) The altitude of the NCP is the same as your latitude.
Cholesterol belongs to what class of organic compounds?
a. Alkyl halides b. Esters c. Carboxylic acids d. Alcohols
When a contracting hot ball of stellar gas spins into a disk shape, it cools faster due to
A) increased convection currents. B) increased radiation transfer. C) decreased insulation. D) increased surface area to volume. E) eddy currents.
Single-Slit Diffraction: A single thin slit forms a diffraction pattern, with the first minimum at an angle of 40.0° from central maximum. If monochromatic light of 530.0-nm wavelength is used for the illumination, what is the width of the slit?
A. 825 nm B. 791 nm C. 757 nm D. 723 nm E. 689 nm