Scientists conduct crash tests on cars to determine their safety. suppose the maximum allowed deceleration during a crash is –23 m/s². the crash tests on the latest model sedan show a deceleration from 10 m/s to 0 m/s in just 0.4 s during a particular type of collision. is the deceleration within the acceptable range?
a. yes, the deceleration is 10 m/s².
b. yes, the deceleration is 20 m/s².
c. no, the deceleration is 24 m/s².
d. no, the deceleration is 25 m/s².

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?