The highest barrier that a projectile can clear is 12.7 m, when the projectile is launched at an angle 19.0° above the horizontal. What is the projectile's launch speed?

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.)

If element x has 99 protons how many electrons does it have

What describes the particles in a liquid