The lightest car in the world was built in london and had a mass of less than 10 kg. it's maximum speed was 25.0 km/h. suppose the driver of this vehicle applies the brakes while the car is moving at its maximum speed. the car stops after traveling 16.0 m. calculate the car's acceleration.

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?