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A 170 km long high-voltage transmissionline 2.0 cm in diameter carries a steady current of 950 A. If the conductor is copper with a free chargedensity of 8.1*1028electrons per cubic meter, how many years does it take one electronto travel the full length of the cable?
While running a marathon, a long-distance runner uses a stopwatch to time herself over a distance of 100. How long will it take her to run a mile at this speed
a diffraction grating with 345 linesnm is 1 m in front of a screen. what is the wavelength of light whose first-order
A light string can support a stationary hanging load of 24.6 kg before breaking. What range of speeds can the object have before the string breaks
a gas is confined in a cylinder with a piston. what happens when work is done on the gas?a container of gas is at a
A beaker is filled to the brim with water. A solid object of mass 3.00 kg is lowered into the beaker so the object is fully submerged in the water, find the buoyant force that acts on the submerged object
A light bulb marked "100 W [at] 120 V" is screwed into a socket at one end of a long extension cord in which each of the two conductors has a resistance of 0.776
q1. a 18.0 kg loudspeaker is suspended 2.40m below the ceiling by two 4.10m long cables that angle outward at equal
A beam of red laser light (? = 633 nm) hits a black wall andis fully absorbed. If this exerts a total force of F = 5.5 nNon the wall, how many photons per second are hitting the wall
find the ratio of vb to vr, where vr is defined above and vb is the boats speed with respect to the water.
A 1.80x10^2 kg piano is being lifted at a steady speed from ground level straight up to an apartment 18.00 m above the ground. The crane that is doing the lifting produces a steady power of 4x10^2 W. How much time does it take to lift piano.
The unit of horsepower was defined by considering the power output of a typical horse. Working-horse guidelines in the 1900s called for them to pull with a force equal to 10% of their body weight at a speed of 3.0 {\rm mph}. Part A For a typical work..
In a head-on collision, the car stops in 0.23 {rm s} from a speed of 17 {rm m}/{rm s}. The driver has a mass of 77 {rm kg}, and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fract..
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