Sirius, the brightest star in the sky, is part of what constellation?
Canis major as found on the celestial sphere or in stellar tables.
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The maximum intensity using coherent sources compared to the maximum intensity using random sources for sources of equal strength is that the maximum in the coherent case is
A) 0.707 times the incoherent. B) triple the incoherent. C) the same as the incoherent. D) half the incoherent. E) double the incoherent.
A +5.0-?C point charge is placed at the 0 cm mark of a meter stick and a -4.0-?C charge is placed at the 50 cm mark. What is the net electric field at the 30 cm mark? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A) 4.0 × 105 N/C B) 5.0 × 105 N/C C) 9.0 × 105 N/C D) 1.4 × 106 N/C
1 This photo shows a modern version of Volta's experiment where zinc and copper rods are inserted into a grapefruit. What function does the grapefruit serve?
a. It interacts chemically with the zinc and with the copper, connecting them and resulting in positive charges produced at one end and negative charges at the other. b. It serves to disguise a battery immersed in the grapefruit. c. Early experiments on electricity involved all kinds of materials, including fruit. d. The sugar found in plants and animals is what causes the electric potential difference. e. It is the living material that is necessary to produce the effect observed by Galvani.
Shown following are six different types of light that travel to Earth from the Sun. Rank these types of light from left to right based on the altitude in the atmosphere where they are completely absorbed, from highest to lowest (Earth's surface). If two (or more) of the choices reach the same altitude or the surface, rank them as equal by dragging one on top of the other(s).
