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The equation of a transverse wave traveling in a string is given by y=a sin(k x??t). the tension in the string is 20.0 n, a = 2 mm, k = 30 rad/m, ? = 850 rad/s. what is the wave speed? What is the linear density of the string?
A certain conductor has 7.60 1028 free electrons per cubic meter, a cross-sectional area of 4.00 ? 10-6 m2, Find the drift speed of the electrons in the conductor
As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an altitude of 510m to be the other plate.
Suppose the gasoline in a car engine burns at 637 oC, while the exhaust temperature (the temperature of the cold reservoir) is 106 oC, Determine the ratio of the total work produced by both engines to that produced by the first engine alone
An object is placed 11 centimeter in front of a spherical refracting surface with a +27 centimeter radius of curvature. Evaluate what is the image distance
The inlet ducting to a jet engine forms a diffuser that steadily decelerates the entering air to zero velocity relative to the engine before the air enters the compressor. determine the temperature, in degrees Celsius, of the air entering the compr..
One hundred turns of insulated copper wire are wrapped around an iron core of cross-sectional area 0.100 m2. The circuit is completed by connecting the coil to a 10-ohms resistor. As the magnetic field along the coil axis changes from 1.00 T to 4...
A total of 31 bright and 31 dark Newton's rings (not countingthe dark spot at the center) are observed when 550 nm light fallsnormally on a planoconvex lens resting on a flat glass surface. How much thicker is the center than the edges
An object weighing 335 N in air is immersed in water after being tied to a string connected to a balance. Find the density of the oil
A Carnot heat engine uses a hot reservoir consisting of a large amount of boiling water and a cold reservoir consisting of a large tub of ice and water. how much work W is performed by the engine
A ball bearing is shot horizontally at 30 m/s and falls for 5.0 sec. Determine how far does it travel horizontally
a uniform steel bar with weight of 98 N and length of 3.0 m is suspended on each end by a rope. A 50.0 kg mass hangs 50.0 cm from the left end of the bar. How much weight does each rope support
a 1200 kg car going 25m/s is brought to stop using its brakes. what is the change in temperature of the brakes and wheels
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