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A plumber needs to generate a torque of 220 N.m in order to loosen a stubborn fixture. The maximum force that the plumber can exert is 400 N. What is the shortest wrench length that the plumber will need to generate this torque?
a 10kg hammer strikes a nail at a velocity of 8.1ms and comes to rest in a time interval of 8.5ms . what is the impulse
The combination of an applied force and a frictional force produces a constant torque of 41 Nm on a wheel rotating about a fixed axis. Determine the magnitude of the frictional torque
What is the wavelength of the peak of the blackbody radiation curve for the human body (T = 311 K)?
A cubic metal box with sides of 19 cm contains air at a pressure of 1 atm and a temperature of 253 K. Find the force due to the internal air pressure on each wall of the box
A large boulder rests on a cliff 500 m above a small village in such a position that, What is the initial speed of the boulder
A presbyopic (farsighted) eye has a near point of 100 cm away. What type of lens is needed to permit the eye to see clearly objects 25 cm away, and what focal length should such a lens have An object is placed 3 cm from a lens.
Suppose you want the atoms in your fusion experiment to have average kinetic energies of 6.4 x 10^-14 J. What temperature is needed?
A bicycle wheel has an initial angular velocity of 16 radians/second and acceleraties to a final angular velocity of 42 radians/second, Determine the time required for this motion to occur
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 3.5 kg*m^2. Calculate the initial and final kinetic energy of the system
A proton enters a uniform electric field by an initial velocity of 6x105 m/s in the x direction. The field has strength of 900 N/C, and is in the -y-direction, pointing from one plate to another as shown. If the plates are 10 cm long, how far is the ..
A railroad car of mass 2.3 104 kg moving at 3.00 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car, How much kinetic energy is lost in the collision
Trucks can be run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 611 rad/s. What is the kinetic energy of the flywheel after charging
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