Physics, 28.06.2019 06:40, anonymous8888
Bob is driving the getaway car after the big bank robbery. he's going 50 m/s when his headlights suddenly reveal a nail strip that the cops have placed across the road 120 m in front of him. if bob can stop in time, he can throw the car into reverse and escape. but if he crosses the nail strip, all his tires will go flat and he will be caught. bob's reaction time before he can hit the brakes is 0.7 s, and his car's maximum deceleration is 10 m/s2.does bob stop before or after the nail strip and by what distance? express your answer with the appropriate units. enter positive value if bob stops after the nail strip and negative value if he stops before it.
Answers: 1
Physics, 22.06.2019 00:10, oktacos
The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?
Answers: 3
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