Some quasars have fuzz around them that produce spectra similar to normal galaxies
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A steel wire hangs from a high-altitude balloon. The steel has unit weight 77 kN/m3 and yield stress of 280 MPa. The required factor of safety against yield is 2.0. The maximum permissible length of the wire is approximately:
(A) 1800 m (B) 2200 m (C) 2600 m (D) 3000 m
Glycerin, with a viscosity of 1.50 N • s/m2, is flowing with an average speed of 1.20 m/s through a tube that has a radius of 5.00 mm and is 25.0 cm long. What is the drop in pressure between the ends of the tube?
A) 144 kPa B) 45.8 kPa C) 72.0 kPa D) 76.3 kPa E) 129 kPa
Newer neutrino detectors have confirmed the total number of solar neutrinos does in fact match predictions
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A charge of 50-?C is placed on the y axis at y = 3.0 cm and a 77-?C charge is placed on the x axis at x = 4.0 cm. If both charges are held fixed, what is the magnitude of the initial acceleration of an electron released from rest at the origin?
A. 1.2 × 1020 m/s2 B. 1.5 × 1020 m/s2 C. 1.0 × 1020 m/s2 D. 1.8 × 1020 m/s2 E. 2.0 × 1020 m/s2