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A massless, rigid board is placed across two bathroom scales that are separated by a distance of 2.06 m. A person lies on the board. The scale under his head reads 458 N, and the scale under his feet reads 323 N.
(a) Find the weight of the person.
(b) Locate the center of gravity of the person relative to the scale beneath his head.
When a large bone such as the femur is broken, the two pieces are often pulled out of alignment by the complicated combination of tension, how much mass m must be attached to the bottom pulley
A string is wound around a metal wheel that is free to spin on a frictionless pivot. A hanging mass is connected to the other end of the string, What is the initial velocity of the hanging mass
A 115 mCi radioactive tracer is made in a reactor. When delivered to a hospital 16 hours later its activity is 95 mCi. For how long (in hours) is the sample usable
In 1911, Ernest Rutherford discovered the nucleus of the atom by observing the scattering of helium nuclei from gold nuclei. If a helium nucleus with a mass of 6.68 10-27 kg.
The system is released from rest with the rod horizontal. If the animals can manage to hold on, illustrate what are their speeds as the rod swings through a vertical position?
A spaceship is coming directly toward you while you are in the international space station. You are told that the spaceship is shining sodium light. You have an apparatus that and resolve two closely spaced wavelengths if the difference is 0.55 nm. I..
A beam of light in air strikes a piece of glas (n = 1.59), Find the angle of incidence if the angle of reflection is twice the angle of refractio
In an EM wave the electric field oscillates 4 X 10^14 HZ at in the North - South direction. In what direction is the magnetic field oscillating
Torque can be calculated by multiplying the force (N) applied at 90 degrees to the lever arm at a distance (m) from the pivot point (point of rotation), what is the torque on the lever
A hollow ball is rolling along a horizontal surface at 3.2m/s when it encounters an upward incline. If it rolls without slipping up the incline
An AC power generator produces 50 A (rms) at 3600 V. The voltage is stepped up to 100 000 V by an ideal transformer and the energy transmitted throughout a long-distance power line with a total resistance of 100 Omega. What is the rms current in l..
Evaluate the magnitude of N at the lowest point? If the wheel's speed is doubled, what is the magnitude FN at the highest and lowest point?
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