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A blue spruce pine tree has the shape of a triangle which is 15 cm off the ground. The triangle has a maximum diameter of 6 m and is 10 m tall. Estimate the drag on the tree if it is exposed to a 25 m=s wind. Use CD ¼ 0.4 in your calculations.
A homogeneous right wedge of mass M, horizontal length L and height H rests on a horizontal plane, with the side L on the plane. Find the position of the center of mass of the wedge
In an exciting game, a baseball player manages to safely slide into second base. Find the magnitude of the frictional force
Water is pumped into a storage tank from a well delivering 19.0 gallons of water in 26.0 seconds through a pipe of 1.00 in.2 cross-sectional area. What is the average velocity of the water in the pipe as the water is pumped from the well?
A hydrogen atom in a state having a bindingenergy (the energy required to remove an electron) of0.85 eV makes a transition to a statewith an excitation energy of 10.2 eV. What is the energy of the photon emitted as a result of the transition
when a piano is properly tuned the note a should have the frequency 440hz and the note e should be at 659hz. the tuner
Suppose a star with radius 8.39 multiply.gif 108 m has a peak wavelength of 686 nm in the spectrum of its emitted radiation. What is the surface temperature of the star
question a non uniform rod ab of mass m and length 2l. the mass per unit lenght of the rod is mx.at a point of the
Light from a star has an intensity of about 75.5×10-8W/m2. how far away is it from Earth
q1. a 10000 kg railroad car is rolling at 2 ms when a 400 kg load of gravel is suddenly dumped in. what is the railroad
You are on a boat in a fog and know there are cliffs ahead of you somewhere, but you cannot see them. How far away are the cliffs
A stone is thrown with an initial speed of 14.4 m/s at an angle of 54 degrees above the horizontal from the top of a 32.1 m tall building. how long will the stone to reach the ground
Using the definition of entropy change, dQ = T dS, what is the entropy change of the hot reservoir
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