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Calculate the smallest number of whole logs (density, p, = 725kg/m3, radius = 0.0800 m, length = 3.00 m) that can be used to create a raft that will carry four persons, each of whom has a mass of 80.0 kg?
A skier starts from rest at the top of a 48 m hill, skis down a 32° incline into a valley, and continues up a 28 m high hill. How fast is the skier moving at the bottom of the valley
a spring is compressed by 2cm and launches a block up an incline (ignore friction). what maximum distance will it travel
A solid metal sphere with radius 0.590m carries a net charge of 0.300 nC. Find the magnitude of the electric field ata point 0.100 m outside the surface of the sphere.
A charge of 3.80 10-6 C is placed on a small conducting sphere that is located at the end of thin insulating rod whose length is 0.22 m. The rod rotates with an angular speed of ω = 156 rad/s about an axis that passes perpendicularly through its o..
A jet flying at 104 m/s banks to make a horizontal turn of radius 4000 m. The mass of the jet is 1.5 x 105. Calculate the magnitude of the necessary lift force
an object is hanging by a string from the ceiling of an elevator. the elevator is moving upward with a constant speed.
a water rocket, launched from the ground, rises verticallywith acceleration of 30 /s2 for 1 s when it runs out of fuel. Disregarding air resistance, how high will the rocket rise
A Carnot engine performs work at the rate of 480 kW while using 760 kcal of heat per second. If the temperature of the heat source is 571°C, at what temperature (in Celsius) is the waste heat exhausted
A circus performer stretches a tightrope between two towers. He strikes one end of the rope, find the tension in the tightrope
a 2.00 nC charge is placed on the x-axis at x= -3.00cm, another 2.00nC charge is placed on the x-axis at x=3.00cm, Calculate the electric potential at the origin
A simple pendulum has a mass of 0.650 kg and a length of 2.00 m. It is displaced through and angle of 7.0 degrees and then released. what is the maximum restoring force using harmonic
while riding on a ferris wheel at the state fair you are seated 10 m from the axis. if you make a complete rotation
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