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which point has the most PE?
which point has the most KE?
which point has the most TE?
Does the skier lose or gain thermal energy as she skies down the slope? how do you know?

Describe the path of a ray that approaches a mirror parallel to the principal axis.

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?

If a simple machine reduces the strength of a force, what must be increased?