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A step-down transformer (turns ratio= 1:8) is used with anelectric train to reduce the voltage from the wall recetacle to avalue needed to operate the train. When the train is running, thecurrent in the secondary coil is 1.6A. What is the current in theprimary coil?
A roller coaster, loaded with passengers, has a mass of 2,000 kg; the radius of curvature of the track at the TOP point before the dip is 24 m. what force is exerted on the vehicle by the track
a banked circular highway curve is designed for traffic moving at 55 kmh. the radius of the curve is 207 m. traffic is
What is the size of the smallest vertical plane mirror in which a 10 tall giraffe standing erect can see her full-length image? (Hint: Locate the image by drawing a number of rays from giraffe's body that reflect off the mirror and go to her eye.
When jumping straight down, you can be seriously injured if you land stiff-legged. In a stiff-legged landing he comes to a halt in 1.61 ms. Find the magnitude of the average net force that acts on him during this time
question1at what distance from a proton is the magnitude of its electric field 2.3times105? what is magnitude of the
A 150-g block of ice at 0°C is placed in an insulated thermos containing 568 g of water at 29°C. What is the mass of water at the end
A transmission line that has a resistance per unit length of4.5*10^-4 ohms/meter is to be used to transmit 5.00MW over 400miles (6.44 *10^5m). WHat fraction of the input power is lost to the line underthese circumstances
A human eyeball is about 2.0 cm long, and the pupil has amaximum diameter of about 8.0 mm. What is the "speed" of this lens
A bullet of mass 0.025kg moves at 100m/s initially. It hits a 2kg block of soft pine and emerges from the block at 30m/s. How fast is the block of wood moving after the bullet emerged?
A banked circular highway curve is designed for traffic moving at 67km/h. The radius of the curve is 209 m. Traffic is moving along highway at 48km/h on a rainy day.
A rectangular loop of wire with width 0.4 cm and length 0.6 cm is oriented with the normal to the face of the loop, Find the magnetic flux through the loop
There are four charges, each with a magnitude of 1.6 µC. Two are positive and two arenegative. Find the magnitude of the net electrostatic force experienced by any charge
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