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According to a report on traumatic brain injury, the force that a professional boxer's fst exerts on his opponent's head is equivalent to being hit with a 5.9kg bowling ball traveling at 8.9m/s that stops in 0.018s. Determine the average force that the fist exerts on the head.
X-ray photons wit a wavelength of .22nm are scattered off free electrons at an angle of 45 degrees. What are the wavelength and the energy of the scattered photons
A 1.9 kg mass, m2, on a theta = 33.6o incline is connected to a 5.4 kg mass, m1, on a horizontal surface. find the magnitude of the tension in the connecting cord
In vacuum, two charged particles lie 2.5 cm apart. Find the magnitude and direction of the electric field at a point midway between the two particles. (One has a charge of -8.0 µC and the other has a charge of +4.0 µC.) Magnitude.
A ten pound car wheel has a moment of inertia of 0.38 kg m2. What is the wheel's rotational kinetic energy
q1. what is the acceleration of two falling sky divers mass 109.0 kg including parachute when the upward force of air
Direction of the surface winds What is the expected composition
A solenoid of inductance L = 50 mH has a magnetic energy U = 3 x10-4 J with a density u = 0.0042 J/m3, What is the winding density n of the solenoid
A cannonball (20kg) is shot from a cannon(200kg) with a velocity of 20m/s. what is the backwards velocity of the cannon
A laser beam of unknown wavelength passes through a diffraction grating having 5510lines/cmafter striking it perpendicularly. At what angle will the next pair of bright spots occur
A 45.8-kg girl is standing on a 161-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. What is the velocity of the plank relative to the ice surface
The displacement vectors 46.0 cm at 15.0° and 23.0 cm at 53.0° both start from the origin and form two sides of a parallelogram. Find the area of the parallelogram
Threshold freq. of metal isf0. When the light of freq. 2f0 is incident on the metal max velocity of electrons is v1 and v2
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