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The primary coil of a step-up transformer is connected across the therminals of a standard wall socket, and resistor 1 with a resistance R1 is connected across the secondary coil. The current in the resistor is then measured. Next, resistor 2 with a resistance R2 is connected directly across the terminals of the wall socket (without the transformer). The current in this resistor is also measured and found to be the same as the curren in resistor 1. How does the resistance R2 compare to the resistance R1?
The spring constant for the tendon is the equal for both groups, 33. What is the difference in highest stored energy between the sprinters and the non athletes?
A particular heat engine has a useful power output of 4.40 kW and an efficiency of 30.0%. The engine expels 7200 J of exhaust energy in each cycle. Find the energy taken in during each cycle
A device uses a Stirling cycle on 433 moles of a monatomic ideal gas between two reservoirs with temperatures of 416 K, How much energy does this device transfer into the hot reservoir
A spherical metallic Christmas tree ornament has a diameter of 6.20 cm. If Saint Nicholas is by the fireplace, 1.41 m away, where will he see his reflection in the ornament
the components of the electric field in an electromagnetic wave traveling in vacuum are described bynbspex 0 ey 0
A student throws a baseball at a large gong 76 m away and hears the sound of the gong 1.95758 s later. What was the average speed of the base- ball on its way to the gong
Find the induced current I in the resistor. A rolling axle, 1.30 m long, is pushed along horizontal rails at a constant speed v=2.91 m/s. A resistor R=0.475Ω is connected to the rails at points a and b, directly opposite from each other.
A circuit is powered by a 12.0 V battery in series with R1=25 ohms A second set of resistors R2= 75 ohms, What is the voltage drop across the 75 ohm resistor
At what position is the third bead in equilibrium? Can it be in stable equilibrium.
A thin spherical shell has a radius R=3 m. A constant force F=2 N is applied to the shell, always tangential to the surface of the sphere, What is the mass of the shell
A mountain climber wears a goose down jacket 2.6cm thick with total surface area 0.95 m2. Determine the rate of heat flow by conduction through the jacket assuming it is dry
What is the highest speed with which an 1180-kg car can round a turn of radius 75.00 m on a flat road if the coefficient of static friction between tires and road is 0.80.
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