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A copper wire is 5-m-long. Its cross-section is circular with a diameter of 1millimeter. If it is stretched to 10 meter long keeping a circular cross-section, then compute what is the new resistance?
A person who weighs 635 N is riding a 98 N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. If the gauge pressure in each tire is 7.25 105 Pa, what is the area of contact between each tire and the ..
A machine part rotates at an angular speed of 0.56 rad/s; its speed is then increased to 3.46 rad/s using an angular acceleration of 0.44 rad/s2, Find the angle through which the part rotates
An uncharged capacitor and a resistor are connected in series to a source of EMF. If ? = 8.43 V, C = 22.6 ?F, and R = 117 ?, find the charge on the capacitor after one time constant
two coupled boxcars are rolling along at 3.5 ms when they collide with and couple to a third stationary boxcar. a what
A ball has a diameter of 3.9 cm and average density of 0.0839 g/cm3. What force is required to hold it completely submerged under water
Determine the kinetic and potential energies when thedisplacement is one half the amplitude. For what value of the displacement does the kineticenergy equal the potential energy?
A 1300-kg car moving on a horizontal surface has speed v = 55km/h when it strikes a horizontal coiled spring, What is the spring stiffness constant of the spring
Calculate the density of a bar of gold with a length
Review Interactive Solution 12.47 for help in approaching this problem. When resting, a person has a metabolic rate of about 7.05 x 105 joules per hour. find the water temperature in degrees Celsius after half an hour
A rod is measured to be 15 cm by an observer moving at 0.80c with respect to the length of the rod. What is the proper length of the rod
A 36.0 g bullet moving at 478 m/s strikes a 3.7 kg bag of flour that is on ice, at rest. The bullet passes during the bag, leaving at 255 m/s. How fast is the bag moving when the bullet exits.
Ideal incompressible water flows through a horizontal pipe of cross-sectional area 10.0 cm^2 at a pressure of 0.250 atm with a volume flow rate of 1.00 x 10^-3 m^3/s. What is the pressure at the valve
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