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Two tiny particles having charges of +7.00 C and -9.00 C are placed along the y-axis. The +7.00-µC particle is at y = 0.00 cm, and the other particle is at y = 40.00 cm. Where a third charged particle should be placed along the y-axis so that it does not experience any net electric force due to the other two particles?
A violin string that is 57.8 cm long has a fundamental frequency of 350 Hz. What is the speed of the waves on this string
A carnot engine operates between a hot reservoir at 310 K and a cold reservoir at 280 K. If it absorbs 500 J of heat at the hot reservoir, how much work (in joules) does it deliver?
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 3.45 × 10-11 m. Determine the magnitude..
A 60.0-kg woman balances on one heel of a pair of high-heeled shoes. If the heel is circular and has a radius of 1.00 cm, what pressure does she exert on the floor if she stands on one foot
A cancer treatment called the gamma knife uses focused 60Co sources to treat tumors. Each 60Co nucleus emits two gamma rays, Determine the effective radiation dose received by the tumor
The magnetic field perpendicular to a circular coil of 5 turnsand diameter 20 cm changes from +1.85 T to -0.25 T in 30 ms. Find the change in magnetic flux and induced emf
A dentist uses a concave mirror (focal length 4 cm) to examine some teeth. If the distance from the object to the mirror is 0.81 cm, what is the magnification of the tooth?
A technician wearing a circular metal band on his wrist moves his hand into a uniform magnetic field of magnitude 2.2 T in a time of 0.48 s. find the magnitude of the average emf induced in the band
A 2.6-kg sphere of radius 35 cm is initially rolling on a flat surface with a speed of v = 0.40 m/s. Determine the force F and the distance l
A bucket filled w/water has a mass of 30kg and is attached to arope that is wound around a cylinder w/radius of 50cm at the top ofa well. What torque does the weight of the water and bucket produce on the cylinder?(g=9.81 m/s2, take care of units1..
a 2500-kg truck moving at 10 ms strikes a car waiting at a traffic light hooking bumpers. the two continue to move
A circuit consists of a resistor, an ideal 1.2-H inductor and an ideal 60-Hz generator, all connected in series. The rms voltage across the resistor is31 V and the rms voltage across the inductor is 37 V.
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