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A man is holding an 8.00-kg vacuum cleaner at arm's length, a distance of 0.550 m from his shoulder. What is the torque on the shoulder joint if the arm is horizontal?
A worker stands still on a roof sloped at an angle of 21° above the horizontal. He is prevented from slipping by a static frictional force of 400 N. Find out the mass of the worker.
A very long solenoid of circular cross section with radius R = 4.0 cm, is centered on, and has its length parallel to, the z axis. What direction is the force on the proton
The filament of an incandescent light bulb typically has a temp of 2,850K. Find lamda max. Is this the wavelength within the visible band? Plot B lamda for this temp, using linear axes.
A 9.14-m ladder with a mass of 24.2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 254 N. What is the net torque acting on the ladder
The electric field midway between two equal but opposite point charges is 878N/C , and the distance between the charges is 25.0cm. What is the magnitude of the charge on each (in C)?
at least Each pulse produced by an argon-fluoride excimer laser used in PRK and LASIK ophthalmic surgery lasts only 10.0 ns but delivers an energy of 2.05 mJ. What is the power produced during each pulse
A softball of mass 0.220kg that is moving with a speed of 8.5m/s collides head-on and elastically with another ball initially at rest. Calculate the mass of the target ball
A 49.2-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.637 and 0.439, respectively. What horizontal pushing force is required
Consider a capacitor consisting of two identical metal plates parallel to each other. Each plate has an area of 140 cm2 and they are separated by 2.7 mm. Find the capacitance of the capacitor
A 23.00 kg chair initially at rest on a horizontal floor requires a 364N horizontal force to set it in motion. Once the chair is in motion, a 328N horizontal force keeps it moving at a constant velocity. A 23.00 kg chair initially at rest on a horizo..
If the plant produces electric energy at the rate of 1.3GW , how much exhaust heat is discharged per hour
A 61 kg speed skater with the velocity of 16 m/s comes into a curve of 18 m radius. How much friction should be exerted between skates and ice to negotiate the curve.
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