There is a +5.0-μc charge at three corners of a square having sides 70 mm long. what is the magnitude of the net electrostatic force on +6.0 μc placed at the center of the square? (k = 1/4πε0 = 9.0 × 109 n ∙ m2/c2)

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.)

Frost wedging occurs when water seeps into a crack in a rock, freezes, and causes the crack in the rock to widen. t or f

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest