Potential difference applied across a wire
A potential difference of 30.0 V is applied across a wire of cross-sectional area 5.01 mm^2 and length 929 km. The current passing through the wire is 2.311×10^-3 A.
a) What is the resistance of the wire?
b) What type of wire is this?
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Find the stiffness of the isolator that is necessary to reduce the force transmitted to the floor to 6,000 N over the operating-speed range of the engine.
A closed 5.00 L flask contains 3g of mercury. The system is all atroom tepmerature of 25 degree C. By how many degree should we increase the temperature of the flask to triple the mercury vaporpressure? (ΔHvapfor mecury is 59.0kJ/mol.)
Carbon dioxide goes from a solid to a gas at -78 degreesCelsius. The molar heat of sublimation is 25.2 kJ/mol. In one experiment, 20.5 g of dry ice is placed in an insulated,isolated container with 500g of water at 25 degrees Celsius.
A 0.050-kg ball at the end of a string rotates at constant speed in a vertical circle with a radius of 0.23 m. What is the maximum speed of the ball so that the tension is not to exceed 12 N?
What is the work done by the water on the piston? For safety reasons, pressure vessels are usually tested with water pressure rather than with air pressure.
A textile manufacturing process finds that on average, 5 flaws occur per every 190 yards of material produced.
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