What is a CCD?
A) It is an electronic detector that can be used in place of photographic film for making images.
B) It is an abbreviation for the world's largest operating telescope.
C) It refers to any kind of instrument that can be hooked up to a telescope.
D) It is a unit used by astronomers to measure angular resolution.
A
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Indicate whether the statement is true or false
What is the most accurate way to determine the distance to a very distant galaxy?
A) Stellar parallax B) main-sequence fitting C) white dwarf supernova D) Cepheid variables E) Hubble's law
A parallel-plate capacitor has plates of area 0.40 m2 and plate separation of 0.20 mm. The capacitor is connected across a 9.0-V potential source. (?0 = 8.85 × 10-12 C2/N ? m2)
(a) What is the magnitude of the electric field between the plates? (b) What is the capacitance of the capacitor? (c) What is the magnitude of the charge on each plate of the capacitor? What will be an ideal response?
What is the de Broglie wavelength of an electron traveling 100 m/s?