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A circular wine barrel 75 cm in diameter will burst if the netupward force exerted on the top of the barrel is 6490 N. A tube 0.8 cm indiameter extends into the barrel through a hole in the top, asindicated in the figure below. Initially, the barrel is filled tothe top and the tube is empty above that level. What weight ofwater must be poured into the tube in order to burst thebarrel? N
A firehose 15 m long is uncoiled by pulling the nozzle end horizontally along a frictionless surface at the steady speed of 2.9 m/s. How much work has been done on the hose
A boat that travels at the speed of 6.75 m/s in still water is to go directly across a river and back. How long does it take to make the round trip
Suppose an ideal gas is in a container 3L in volume and allowed to expand by having a piston move. The final volume after the piston moves is 15L. If the gas is at first at a pressure of 1×10^5 Pa and a temperature of 300 K, and temperature is mai..
A 28.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface, What is the force of friction acting on the block
Explain how Karl lifed th cement. How much time would it take for the police officer to catch the speeder, assuming that the speeder maintains a sonstant speed? How fast will the police officer be traveling at this time.
a woman standing on a hill sees a flagpole that she know is 60 feet tall. the angle of depression to the bottom of the
a hollow sphere has a mass of 15kg, an inner radius of 12cm and an outer radius of 18cm. What is the rotational inertia of the sphere
A -10.5 nC point charge and a + 21 nC point charge are 16.5 cm apart on the x- axis. where the electric potential is zero
A spring with a force constant of 130 is attached to the backpack and pulled horizontally, as indicated in the figure .If the backpack begins to slide when the spring ( = 130 ) stretches by 2.40, illustrate what is the coefficient of static fric..
A child in danger of drowning in a river is carried downstream by a current that flows uniformly with a velocity of 2.0 meters per second.
A 42.0 kg block of ice slides down the plane incline 34.0 degrees. Assuming friction is negligible, what is the acceleration of the block down the incline
Each of the six real batteries in the figure has an emf of 21.5 Vand a resistance of 4.10 Ω. The external resistor hasresistance R = 3.59 Ω. At what rate does each battery transfer energy to its internal thermal energy?
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