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A 35.0-mH inductor has a reactance of 1.80 k.
(a) What is the frequency of the ac current that passes through the inductor?
(b) What is the capacitance of a capacitor that has the same reactance at this frequency? The frequency is tripled, so that the reactances of the inductor and capacitor are no longer equal. What are the new reactances of
(c) the inductor and
(d) the capacitor?
3 charges (q1=2q, q2 = 3q, q3=-q ) where q = 1c , are arranged to form an equilateral triangle that is 10 cm on a side. What is the electric feild in the middle
At a certain location, the horizontal component of the earth's magnetic field is 4.90 10-5 T, due north. A proton moves eastward with just the right speed, so magnetic force on it balances its weight. Find the speed of the proton.
A 1 kg ball is attached to a 2 m long piece of very light string and suspended in such a way that it can freely swing and it passes just above the ground.
0.75 kg block of ice is sliding by you on a very slippery floor at 2.5 m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with the ice block for 0.003 seconds. The block eventually slides at an angle of 22 de..
A person wearing a safety belt can withstand an acceleration of -3.0 x 10^2 m/s2. How thick must barriers be to safely stop a car that hits a barrier at 112 km/h.
A transformer connected to a 100 V (rms) ac line is to supply 8.0 V (rms) to a portable electronic device. What rms current must the secondary supply
what is the magnitude of its velocity after the collision. A soccer player applies a force of 60.5 N to a soccer ball while kicking it. If the ball has a mass of 0.42kg, what is the acceleration of the soccer ball.
To determine the specific heat of an object, a student heats it to 100 in boiling water. She then places the 68.5 object in a 196 aluminum calorimeter containing 135 of water. The aluminum and water are initially at a temperature of 19.5, and are ..
Two soccer players, Mia and Alice, are running as Alice passes the ball to Mia. What is the magnitude and direction of the velocity of the ball relative to the ground
The two spheres are then connected by a thin conducting wire, What is the charge on the first sphere after the two spheres are connected by the wire
A hawk is flying horizontally at 17.0m/s in a straight line, 160 m above the ground. A mouse it has been carrying struggles free from its grasp. The hawk continues on its path at the same speed for 2.00s before attempting to retrieve its prey.
A magnetic field is directed at a 40.0 angle to a plane circular loop of wire with a radius of 26.8 cm. a) draw a diagram showing the wire loop, what is the induced emf in the wire loop
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