An engineer is setting a speed limit on a road. She wants a car to be able to stop in 147ft and knows that the maximum rate at which a car can safely
brake is 20.0ft/s?
What initial speed (in given units) will allow the car to come a stop at the stop
sign when braking with this acceleration?
mph
Could a car traveling 60mph come to a stop before the stop sign?
chock

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.