Heat q flows spontaneously from a reservoir at 404 k into a reservoir at 298 k. because of the spontaneous flow, 2740 j of energy is rendered unavailable for work when a carnot engine operates between the reservoir at 298 k and a reservoir at 245 k. find q.

An object is moving east, and it’s velocity changes from 65m/s to 25m/s in 10 seconds. which describes the 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?

What are similarities and differences of reflection, refraction, diffraction and absorption?