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1. In 1638, Galileo estimated that a tree over 300. ft tall would collapse under its own weight. Using the modern theory, determine the diameter of the base of such a tree.
2. What is the maximum height of a California redwood tree whose base diameter is 10.0 ft if its weight density is 40.0 lbf/ft3 and its elastic modulus is 1.30 × 106 psi?
Assume that you wish to fabricate a uniform wire out of0.950 g of copper. If the wire is to have a resistance R = 0.500, and if all of the copper is to be used. What will be the length of the wire?
1. Draw a physical representation of the situation defining all relevant quantities and symbols you use. 2. Find the electric potential at the center using integration.
When a crown with mass 14,7 kg is submerged in water, an accurate scale reads only 13.4 kg. Is the crown made of gold
A rope is attached to a ball, and then the ball is swung with constant speed in a horizontal circle of radius 1 m. If the tension in the rope is 100 N, How much work does the tension force do on the ball
a projectile passes point a with a velocity v upward. at some time later the projectile passes point b with a velocity
A single conducting loop of wire has an area of 6.7 10-4 m2 and a resistance of 110 . Perpendicular to the plane of the loop is a magnetic field of strength 0.18 T. At what rate (in T/s) must this field change if the induced current in the loop is to..
Following the stream cross section (ft2) and the stream velocity (ft/sec) allows us to calculate the stream flow (ft3/sec). The watershed runoff during a storm is 3.5 ft. high and flows in 18 ft. wide channel. The velocity is measured at 1.2 feet ..
A wire is 2.5 m long. After applying a force to one end of thewire, it is now 2.501 m long. Calculate the tensile strain in the wire
assuming each quadrant of the pizza to be the same find the center of mass of the uneaten pizza above the axis that is
If the oxygen atom at this site is chemically replaced with a sulphur atom, the spring constant of the bond is unchanged (sulphur is just below oxygen in the Period Table). Predict the frequency for a DNA molecule after the sulphur substition.
select the quantity that has changed(velocity or speed) for a car that travels north at 88 km/h and then turns east while continuing to move at 88 km/h. define your answer.
A hypothetical planet's radius is 5750 km and the mass is 5.00x1024 kg. What is the escape velocity on the hypothetical planet?
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