Giant irregulars are the most massive of all known galaxies
Indicate whether the statement is true or false
FALSE
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Consider a point charge and an imaginary spherical surface surrounding it. Which of the following situations would bring about a change in the electrical flux through the surface
A. Exchanging the spherical surface for a cylindrical surface that still contains the original point charge B. Bringing a second point charge nearby, but outside the surface C. Moving the point charge to a point not in the center of the spherical surface D. Bringing a second point charge nearby, and within the surface
Waves propagate at 7.40 m/s along a stretched string. The end of the string is vibrated up and down once every 2.25 s. What is the wavelength of the waves that travel along the string?
a. 4.50 m b. 16.7 m c. 3.29 m d. 37.5 m e. 8.09 m
You have discovered a new asteroid, which has a moon in an elliptical orbit around it. From a series of observations, you establish that the closest approach occurs when the moon is 49,000 m from the asteroid,
the furthest separation is 98,000 m, and the speed of the moon at the point of closest approach is 7.50 m/s. What is the mass of the asteroid? G = 6.67 x 10-11 N•m2/kg2. A) 4.25 × 1016 kg B) 9.87 × 1016 kg C) 3.10 × 1016 kg D) 2.04 × 1016 kg E) 5.05 × 1016 kg
A Trombe wall in a house uses a large window and ______
a. R-19 insulation in the walls b. a vertical thermal mass across the room from the window c. a vertical thermal mass close to the window d. a slate floor by the window e. a vertical flat plate collector using water