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at a junction in an a-c circuit a single current divides into two seperate currents I1=10,, I2=5, where I1 lags I2 by 30, use comlex numbers to represent currents. assume I2 to have zero phase angle what is the phase angle of I1 in this case ?
A Hall probe uses the Hall effect to measure the size of magnetic fields - it does this by measuring the potential difference across the electric field created by the displacement of charge
A 60 kg car moving towards the right at 5 m/s collides head on with an 50 kg car moving towards the left at 6 m/s, find the velocity of the combined bodies
A box stands against the wall of a cylinder that is rotating. The cylinder has a radius of 30cm. What is the minimum consant speed (magnitude of linear velocity) the box must move so it doesn't slip
A railroad car of mass 2.52 104 kg is moving with a speed of 4.06 m/s. It collides and couples with three other coupled railroad cars, How much mechanical energy is lost in the collision
Next, a beaker of water is placed so that the iron block is submerged in the beaker not touching the bottom. What mass (in kg) is now necessary to balance the scales
He was supposed to travel due north for 5.6km, but he actuallytraveled 7.8km at 50 degrees north due east. (a) how far and (b) elucidate in what direction must he now travel to reach base camp?
An object 9 cm tall is placed at the zero mark of a meterstick. A spherical mirror located at some point on the meterstick creates an image of the object that is upright, 4 cm tall, and located at the 49.0 cm mark of the meterstick.
An electron is released from rest at the negative plate of a parallel plate capacitor. How fast is the electron moving just before it reaches the positive plate
Two conductors having net charges of + 10.0 µC and - 10.0 µC have a potential difference of 10.0 V between them. (a) Determine the capacitance of the system. (b) What is the potential difference between the two conductors if the charges on each ar..
An antiaircraft shell is fired vertically upward with an initial velocity of 200m/s. compute the maximum height of the shell
A car drives west on sw 8th street at a speed of 30.7 mph. The driver hits the brakes and the car slows down with a constant acceleration of 4.8 m/s^2
Under an outdoor area "yellow" [Na lamp] light, a fiber is placed between but at the edge of two 3 cm glass slides. How thick is the fiber
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