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Calculate the torque produced by holding a 2kg dumbbell in the hand at 10 degrees of shoulder abduction and then at 85 degrees of shoulder abduction. The distance between the joint center of the shoulder joint and the hand holding the dumbbell is .75 m.
A toy of mass 0.155 kg is undergoing SHM on the end of a horizontal spring with forces constant 305 N/m. When object is a distance 1.20×10-2 m from its equilibrium position, it is observed to have the speed of 0.255 m/s.
a two stage rocket of mass 751kg traveling at speed 709ms separates into a first stage of mass 236kg moving at zero
A small but measurable current of 1.2*10^-10 A exists in a copper wire whose diameter is 2.5mm compute the current density and the electron drift speed.
An iron casting containing a number of cavities weighs 20052.8 N in air and 16121.0 N in water. What is the total volume of all the cavities in the casting
A spherical Christmas tree ornament is 3.84 cm in diameter. What is the magnification of the image of an object placed 11.1 cm away from the ornament
What force must be applied to push a carton weighing287 newtons up a 19° incline, if the coefficient of kineticfriction is 0.3. Assume the force is applied parallel to the incline and the velocity is constant.
A cubical box of widths Lx = Ly = Lz = L = 4.82 nm contains eight electrons. What is the energy of the ground state of this system? Assume that the electrons do not interact with one another, and do not neglect spin.
When a potential difference of 12 V is applied to a wire 7.0m long and 0.32mm in diameter the result is an electric current of 2.0 A. What is the resistivity of the wire
A model rocket is launched straight upward with an initial speed of 49.4 m/s. It accelerates with a constant upward acceleration of 2.25 m/s2 until its engines stop at an altitude of 187 meter. Compute the maximum height reached by the rocket
a rock is dropped from rest from a height h above the ground. it falls amp hits the ground with a speed of 11ms. from
Two ice skaters stand at rest in the center of an ice rink. When they push off against one another the 68-kg skater acquires a speed of 0.60m/s. what is this skater's mass
You are in a space shuttle traveling in the circular orbit, which is 410 km above the Earth. How long will it take you to catch up with your friend if you reduce your orbital radius by 1 km
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