____________________ Seyfert galaxies are very luminous at X-ray and ultraviolet wavelengths and have broad emission lines in their spectra
Fill in the blank(s) with correct word
Type 1
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Buoyancy: A crane lifts a steel submarine of density 7800 kg/m3 and mass 20,000 kg. What is the tension in the lifting cable (a) when the submarine is submerged in water of density 1000 kg/m3, and (b) when it is entirely out of the water?
A. (a) 2.0 × 105 N (b) 1.7 × 105 N B. (a) 1.7 × 105 N (b) 2.0 × 105 N C. (a) 2.6 × 103 N (b) 2.0 × 105 N D. (a) 2.0 × 105 N (b) 2.6 × 103 N
What is the zone of avoidance?
A. a part of the sky in which astronomers cannot observe due to bright emission from interstellar dust B. a quadrant of the Galaxy where no galaxies exist C. a part of the region of the Solar System where it is too dangerous to send spacecraft D. the region of the sky where no galaxies are seen due to obscuring dust in the Milky Way
A basketball player pushes down with a force of 50 N on a basketball that is inflated to a gauge pressure of 8.0 × 104 Pa. What is the diameter of contact between the ball and the floor?
A) 2.8 cm B) 1.4 cm C) 1.7 cm D) 2.1 cm E) 5.6 cm
If the minus sign were not in Faraday's law it would lead to a violation of the law of conservation of energy
Indicate whether the statement is true or false