Four 16-?F capacitors are connected in combination. What is the equivalent capacitance of this combination if they are connected
(a) in series?
(b) in parallel?
(c) such that two of them are in parallel with each other and that combination is in series with the remaining two capacitors?
(a) 4.0 µF (b) 64 µF (c) 6.4 µF
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If the absolute magnitude, M, of a supernova is ?19 and a galaxy is found that contains a supernova with an apparent magnitude, m, of 16 . What is the distance to the galaxy? Hint: dpc = 10(m - M + 5)/5
a. 100 AU b. 100 pc c. 100 ly d. 100 kpc e. 100 Mpc
When a diffraction grating having 5000 lines/cmis illuminated by monochromatic light, the angle between the central maximum and the fourth order maximum is 47.2°. What is the wavelength of the light?
A) 367 nm B) 183 nm C) 138 nm D) 637 nm
__________is an 18-year, 11 -day period after which the pattern of lunar and solar eclipses repeats
A) The Sothic cycle B) The Saros cycle C) The CNO cycle D) A Milankovitch cycle
Suppose you are looking at the sky at about midnight on the December solstice. Based on the given right ascensions and declinations, which of the following stars will be nearest to your meridian? Assume you live at a latitude where all the stars on this list rise above your horizon each day. (Hint: Recall that the Sun's celestial coordinates on the December solstice are RA = 18h, dec = -23-1/2°.)
A) Spica: RA = 13hr 25m, dec = -11°09' B) Deneb: RA = 20hr 41m, dec = +45°16' C) Sirius: RA = 6hr 45m, dec = -16°42' D) Alpha Centauri: RA = 14hr 40m, dec = -60°50' E) Vega: RA = 18hr 37m, dec = +38°47'