Recent findings lend strong support to the theory that a black hole lies at the center of the milky way and of many of the 100 billion other galaxies estimated to exist in the universe.(a) that a black hole lies at the center of the milky way and of(b) that a black hole lies at the milky way's center and(c) that there is a black hole lying at the milky way’s center and(d) of a black hole lying at the milky way's center and(e) of a black hole that lies at the center of the milky way and of

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u. s. legal proceeding.)

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

The mantle is made up of which structural zones?