(a) a spring exerts a force of 13.0n when stretched 1.3m beyond its natural length. assuming that hooke's law applies, how much work was performed in stretching the spring to this length?
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(b) a spring exerts a force of 4.4n when stretched 1.1m beyond its natural length. how far beyond its natural length the spring can be stretched with 5.12j of work?
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Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =

What equation is used to calculate the weight of an object on a plant ?