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child whose mass is 30 kg sits on a merry-go-round at a distance of 2 m from the center. The merry-go-round makes one revolution every 6 s. What is the magnitude of the net force (in Newton) acting on the child?
A series RLC circuit has R= 50, L= 2.7 H, and C= 52 nF. It is connected to an AC voltage source with an rms amplitude of 12 V, find the average power dissipated by the circuit
A He-Ne laser beam with an intensity of 1.00 103 W/m2 is incident from air to dense flint, Find the intensity of the beam transmitted into the dense flint
A sign (mass 1700kg ) hangs from the end of a vertical steel girder with a cross-sectional area of 0.013m^2, What is the stress within the girder
A beam of unpolarized light of intensity 12.o w/m^2 is incident on an ideal linear polarizer, P1, whose transmission axis is in the vertical (y) direction, What is the intensity of light emerging from P1
A flat circular coil with 110 turns, a radius of 3.80 × 10-2 m, and a resistance of 0.340 ? is exposed to an external magnetic field that is directed perpendicular to the plane of the coil, Find the induced current in the coil
An electron moves at right angles to a magnetic field of 0.109 T. What is its speed if the force exerted on it is 9×10-15 N.
A 150 g block of ice at 0 C is dropped into 350 g of water at 25 C, compute the final equilibrium temperature
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 3.10 × 1013 kg.m/s. Find the relativistic momentum of the spacecraft
In a model AC generator, a 500-turn rectangular coil 8.0 cm by 20 cm rotates at 120 rev/min in a uniform magnetic field of 0.60 T. what is the maximum emf induced in the coil.
In a circut all six resistors share the same value R. Calculate the equivalent resistance between points A & B
A 250MW laser pulse is focused with a lens to a diameter of 2.5?m. What is the laser beam's electric field amplitude at the focal point
A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is, ? = Ar for r R, Find the expressions for the electric field inside the sphere
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