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An oar used to row a boat has the handle 55 centimeters from the fulcrum and the blade 220 centimeters. Find the mechanical advantage of the oar.
Suppose a projectile is to be launched at 35 degrees to the horizontal, from point A, at a vertical distance of 3.3 km and a horizontal distance of 9.4 km, Calculate the initial speed required to satisfy the above conditions
The electron concentration in a doped silicon sample at T=300K is n0 = 5x104 cm-3. Decide the whole concentration, p0. Is this material n-type or p-type? Discover the position of the Fermi level.
You are trying out for the position of place-kicker on a professional football team. By how much is it under or over the bar
Assume that the earth andthe moon have circular orbits (which is almost true) and that theperiods of their orbits are 365 {\rm days} and 28.0 {\rm days}, respectively. How much work does the earth do on the moon in one day
The spin cycles of a washing machine have two angular speeds, 408rev/min and 648rev/min. Find the laundry's maximum radial acceleration
a steady horizontal force f of magnitude 21 n is applied at the axle of a solid disk as shown. the disk has mass 2.0 kg
Two forces are applied to a block of mass M equal to 14 kg that sits on a horizontal, frictionless table. Find the x and y components of the second force
Multiple-Concept Example 6 reviews the concepts that play a role in this problem. A diver springs upward with an initial speed of 1.89 m/s from a 3.0-m board. Find the velocity with which he strikes the water
A 60.0-kg woman balances on one heel of a pair of high-heeled shoes. If the heel is circular and has a radius of 1.00 cm, what pressure does she exert on the floor if she stands on one foot
A 61.5-kg person, running horizontally with a velocity of +3.99 m/s, jumps onto a 16.2-kg sled that is initially at rest. Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away
Water flows through a horizontal tube of diameter 2.8 centimeter that is joined to a second horizontal tube of diameter 2 centimeter. Find which tube has the higher speed of flow
Two friends enter the Boston marathon. The first friend runs at a constant speed of 0.500 m/s. The second friend holds a speed of 1.00 m/s. how many hours would he be waiting once he stops
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