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Force F = -13jhatN is exerted on a particle at r = (3ihat+5jhat)m
What is the torque on the particle about the origin?
Suppose the current suddenly increases to 1.55 A in the same direction as before, due to an increase in speed of the bar. Find the emf induced in the rod
He is sitting on a set of bathroom scales. He notes that scales show four times his normal weight. What is the radius of the loop, in meters.
A 55.5 kg ice skater is moving at 3.99 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. What is the ratio of this force to her weight
The position vector of a 1.0-kg particle is given by r = 3 i + 2 j + 5 k and its velocity by v = 8 i - 2 k. Find the magnitude of the particle's angular momentum in kg.m2/s
a uniform stick 1.5 meters long With a massive 220 kg is pivoted at its center a 3.9 kg bullet is shot through the stick midway between the pivot, What is the angular speed of the spinning stick
At what speed (m/s) would a 1140-kg car have the same momentum as a 12,600-kg truck traveling at17.8km/hr,What is the car's change in momentum
The semiconducting compound ZnS is widely used for ultraviolet light emitting diodes (LED's). find the frequency of light emitted by a ZnS LED
What is the speed of the block while the spring is till now compressed by xf=0.14m.
In one cycle, a heat engine does 310 J of work and releases 620 J of heat to a lower-temperature reservoir. What is the efficiency of the engine
A certain toaster has a heating element made of Nichrome resistance wire, What is the final temperature of the heating element
A 200-W infrared laser emits photons with a wavelength of 1.05 multiply.gif 10-6 m, and a 200-W ultraviolet light emits photons with a wavelength of 3.51 multiply.gif 10-7 m. What is the energy of a single infrared photon
You are asked to construct a capacitor having a capacitance near 1 nF and a breakdown potential in excess of 10,000 V, What is the breakdown potential of this capacitor
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