The Bur Oak Tree comes from a single seed and can grow to be 60 feet tall. Students wondered how the Bur Oak Tree gets
the material it needs to grow from a single seed to a tree so
tall. They did some research and learned that trees make
their own food by using the sun's energy to change carbon,
hydrogen, and oxygen into a simple sugar.
26. . Develop a model to show how trees form and use simple sugar to get the energy they need
for life. Use your model to explain how energy flows through the systems as food is broken
down and rearranged.
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This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?