Plants are responsible for a very important energy transformation, as shown. at left, a small grey circle is followed by an arrow pointing right to a large grey circle with a small white circle centered in it. the 4 arrows point to a vertical row of 4 images, 1 arrow per image. from top there are a medium sized grey circle with a small white circle centered in it, then a small grey circle, then another small grey circle, then another medium sized grey circle with a small white circle centered in it. then comes + energy. at the top of the vertical row of 4 images is the label nucleus. at the bottom of the vertical row of 4 images is the label nucleus. which energy transformation does the picture best illustrate? radiant to chemical nuclear to mechanical chemical to thermal mechanical to chemical

As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.