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A bob of mass = 0.300 is suspended from a fixed point with a massless string of length = 25.0 . You will investigate the motion in which the string traces a conical surface with half-angle = 21.0 What tangential speed must the bob have so that it moves in a horizontal circle with the string making an angle 21.0 with the vertical?
Supposing that the Earth's magnetic field at this location is 2.0*10^-5 T, due north, what will be the induced emf in the wire 2.0s after it is released (the wire is in free fall, you can calculate its velocity after 2.0s)
The internal energy of a system changes becasue the system gains 176 J of heat and performs 312 J of work. During this return process, what work is involved
Argon gas enters an adiabatic turbine steadily at 1600kPa and 450 degrees Celsius with a velocity of 55m/s and leaves at 150 kPa with a velocity of 150m/s. determine the exit temperature of the argon
A Father pulls his sons across the son on a sled. The children and sled together weigh 550-N. The father pulls the sled with a force of 400-N at an angle of 40 degrees above the horizontal. Avoiding friction, determine out the acceleration of the ..
3 objects are connected on an inclined table with the masses of 8.0kg, 4.0kg and 2.0kg and the pulleys are frictionless. determine the acceleration and direction of the motion of the system
A monochromatic beam of light is absorbed by a collection of ground-state hydrogen atoms in such a way that three different wavelengths are observed, What is the wavelength of the incident beam
Big yellow fishing swimming at 2.0m/s swallows little green fish at rest. What fraction of big yellow fish's initial kinetic energy was lost is this collision
An x-ray photon with wavelength 15.0 pm is scattered at 84.0 degrees by an electron, find the resulting kinetic energy of the electron
2.30×106 atoms are excited to an upper energy level at t=0s. At the end of 10.0ns, How many photons have been emitted
If two tiny identical spheres attract each other with a force of 4.00nN when they are 28.0cm apart, what is the mass of each sphere
A truck with 0.420 m radius tires travels at 34 m/s. What is the angular velocity of the rotating tires in radians per second
On a frictionless, horizontal air track, a glider oscillates at the end of an ideal spring of force constant 4.00. Find the maximum force the spring exerts on the glider
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