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.)
What factor gives citizens' groups influence over legislators on environmental issues? question 4 options: they can give interviews to the media. their members vote in elections. they have a great deal of money. their leaders can run for office.
Cobwebs are popular decorations at halloween time, but an experiment in which spiders were given psychoactive substances showed that it really affects their web spinning skills! the web below was spun under the influence of what?