Stars of types ________ and ________ are found only in the youngest star clusters
Fill in the blank(s) with correct word
O; B
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A 3.0 kg mass is connected to a spring with a spring constant of 6.0 N/m. The velocity is given by the expression v(t) = 10.0 cm/s sin
What is the maximum velocity of the simple harmonic motion?
A. 10 cm/s B. 14 cm/s C. 17 cm/s D. 20 cm/s E. 25 cm/s
Betelgeuse is the bright red star representing the left shoulder of the constellation Orion. All the following statements about Betelgeuse are true. Which one can you infer from its red color?
A) Its surface is cooler than the surface of the Sun. B) It is much brighter than the Sun. C) It is much more massive than the Sun. D) It is moving away from us.
In the proton-proton cycle, the helium atom and neutrino have less mass than the original hydrogen. What happens to the "lost" mass?
A) It is recycled back into hydrogen. B) It is ejected into space. C) It is converted to energy. D) It is transformed into electrons. E) Conservation of mass dictates no mass can be lost.
Charges 6.8 ?C, 6.1 ?C, and -1.5 ?C are brought from infinity to the respective vertices of an equilateral triangle with 11. cm sides
$$ (a) How much energy did it take to move the charges to the triangle vertices? (b) What is the potential at the center of the triangle?