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A motor operating on a 260 V source has a 190 V back emf at operating speed and draws a 145 A current. Randomized Variables V = 260 V epsilonb = 190 V If=14.5 A.
Part (a) What is its resistance in Ohm?
Part (b) What current does it draw when it is first started in A?
A hunter aims directly at a target (on thesame level) 130 m away. If the bullet leaves the gun at aspeed of 290 m/s, by how much will it miss the target
two protons are placed at a 5.05 cm above and below the x axis at x 0 as shown in the figure. an electron is placed
One kilogram of dry air at STP conditions is exposed to 1.00 R of X-rays. One roentgen is defined by Equation 32.1 in Section 32.1. An equivalent definition can be based on the fact that an exposure of one roentgen deposits 8.30 x 10-3 J of energy..
A carefully designed experiment can measure the gravitational force between masses of 3 kg. Given that the density of iron is 7860 kg/m3, what is the gravitational force between two 3.00-kg iron spheres that are touching?
A block rests on a horizontal, frictionless surface. A string is attached to the block, and is pulled with a force of 44.0 N at an angle θ above the horizontal. After the block is pulled through a distance of 17.0 m its speed is v = 2.10 m/s, and 55...
A playground merry-go-round has a radius of 4.20m and a moment of inertia of 255kg m2 and turns with negligible friction about a vertical axle through its center. What is the average power supplied by the child
A 24-V battery is connected in series with a resistor and an inductor, with R = 2.0 and L = 4.4 H, respectively. Discover the energy stored in the inductor when the current reaches its maximum value. Discover the energy stored in the inductor one tim..
A wire running parallel to the x-axis has a current of 3.40A in the +x direction. There is a uniform magnetic field of B=0.003 i + 0.004 j + 0.002 k Tesla. Calculate the y-component of the magnetic force acting on a piece of wire of length L = 18.0cm..
at some point in space,the x and y components of the electric field are Ex= 1.73 N/C, respectively and Ey= 3.75 N/, respectively. What is the net charge of the particle
You support one end of a stick of mass M and length L with the tip of your finger. what angle does the force points horizontally
An ideal gas undergoes isothermal compression from an initial volume of 5.37 m3 to a final volume of 2.27 m3. There is 6.45 mol of the gas, How much work is done by the gas
A solenoid is designed to prodcue a 2.78*10^-2 T magnetic field near its center. It has a radious of 1.4cm, What total length of wire is required to make this solenoid
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