The Space Shuttle has three LOX/Hydrogen engines for liftoff, each with a thrust of 1668 kN (kilo means 1000X) and a burn time
of 520 seconds. What total impulse can be delivered during a launch?

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.)

In 1980, alfa romeo introduced the first system to smooth a rough idle caused by ignition and camshaft timing changes.

In a system, when potential energy decreases, then entropy also decreases. true false