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A horizontal, 30-cm-long conducting rod is rolling along two conducting rails that are parallel to the x-axis. The rod is parallel to the y-axis, but moves in the +x direction with a speed of 6.5 m/s . The rails are electrically connected by a second conducting rod attached to the rails at an x-coordinate smaller than that of the rod. The entire assembly is immersed in a uniform magnetic field of 0.45 T in the +z direction (up). An emf is developed by the moving conductor. The moving rod has a resistance of 8.7 ohms, while the resistance of the circuit-closing rod and rails in series with the rod is 95 ohms. The emf drives a current around the circuit. Neglecting friction, what force (in Newtons) is needed to keep the rod moving at a constant speed?
The image behind a convex mirror (radius of curvature = 66.0 cm) is located 25.0 cm from the mirror. what is the magnification of the mirror
A person with a near-point distance of 29 cm is able to get a usable magnification of 12 with a particular magnifying glass. What is the friend's near-point distance
An eagle is flying due east at 8.9 m/s carrying a gopher in its talons. What is the magnitude of the gopher's velocity as it reaches the ground
A child in a boat throws a 5.600 kg package out horizontally with a speed of 11.00 m/s. Determine the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 23.00 kg and that of the boat is 45.00 kg.
The muons created by cosmic rays in the upper atmosphere rain down uniformly on the earth's surface, although some of them decay on the way down, with a half-life of about 1.5?s (measured in their rest frame).
You are at a party playing a game of “spin the bottle” when you notice an insect in the bottle. When the bottle is spinning, is the insect in an inertial or noninertial reference frame? Explain why in complete sentences.
a velocity selector is used in a mass spectrometer to produce a beam of charged particles with uniform velocity.suppose
The density of Muriatic acid is 1200 kg per cubic meter. Calculate its specific gravity
question a cord attached to a cart that can slide along a frictionless horizontal rail aligned along an x axis. the
80 cm3 of water takes 12 min to cool from 40?C to 15?C in a draft; it is contained in a copper calorimeter of mass 150 g, Calculate the specific heat of the suspension in SI units
Suppose that a block of mass m = 9.0 kg moving with speed V is behind a block of mass M = 27 kg and speed of 0.5 m/s, How much kinetic energy of the blocks is lost due to the collision
A block of mass m = 5.5 kg is pulled up a ? = 26° incline as in the figure with a force of magnitude F = 37 N. Find the acceleration of the block if the incline is frictionless
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