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A copper rod has a length of 1.7 m and a cross-sectional area of4.1 x10-4 m2.One end of the rod is in contact with boiling water and the other with a mixture of ice and water. What is the mass of ice per second that melts? Assume that no heat is lost through the side surface of the rod.
An airplane pulls a 24 kg banner on a cable as depicted in the figure below. When the plane has a constant cruising velocity the cable makes an angle of ? = 26°
The hammer throw is a track-and-field event in which a 7.30-kg ball (the hammer) is whirled around in a circle several times and released. It then moves upward on the familiar curved path of projectile motion and eventually returns to the ground s..
The heating element of a simple heater consists of a 1.9-m-long, 0.65-mm-diameter nichrome wire. What is the wire's resistance when it is hot
A particle rotates in a circle with a centripetal acceleration of 9.81 meters per second squared. what is the new centripetal acceleration in terms of the original value
A bare helium nucleus has two positive charges and a mass of 6.64 multiplied by 10-27 kg. What voltage would be needed to obtain this energy
IP At a certain distance from the center of the Earth, a 5.0- object has a weight of 3.0 . Find this distance. By what factor does its initial acceleration change
A cannon ball (m=.7 kg) traveling at 200m/s hits and is impeded into a 400 kg car. If the car was initially at rest, what will be its velocity after the impact
The first star on the handle of the Big Dipper and the star that forms the far bottom edge of the bowl(Merak).
In a hot star, because of the high temperature, an atom can absorb sufficient energy to remove several electrons from the atom. Find the wavelengths of the next three spectral lines nearest to the line of longest wavelength
A flight attendant pulls her 61N flight bag a distance of 279m along a level airport floor at a constant velocity. The force she exerts is 41N at the angle of 50° above the horizontal.
A ballon contains 2 lbs of Helium at 70 degrees F, if the pressure of the ballon is 65 psia, what is the volume of the ballon in cubic feet
A ship is expecting to travel to its home port 410 km due East. Before the ship starts to travel, a severe storm comes up and blows the ship 290 km due South. How far is the ship from its home port
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