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A platinum resistance thermometer has resistances of 170.0 when placed in a 0°C ice bath and 244.8 when immersed in a crucible containing a melting substance. What is the melting point of this substance? (Hint: First determine the resistance of the platinum resistance thermometer at room temperature, 20°C.)
An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 26.7 m/s. Find the airplane\'s acceleration
The total translational kinetic energy of the molecules of a sample of gas at 421 k is 3.95x10^4j. Find the average translational kinetic energy of a single molecule
careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the
Calculate the momentum of a 17m^3 of air (density of 1.3kg/m^3) hitting a sky diver traveling 52 m/s
The treasure map in the figure gives the following directions to the buried treasure: "Start at the old oak tree, walk due north for 550 paces, How far should you go to reach the treasure
A window washer is standing on a scaffold supported by avertical rope at each end. What is the tension in each rope when the 710 N worker stands 2.00 m from one end
A 150-g aluminum cup contains 900 g of water in thermal equilibrium with the cup at 85°C. The combination of cup and water is cooled uniformly so that the temperature decreases by 1.6°C per minute. At what rate is energy being removed? Express your a..
Electrons are injected into a chamber with a B field of 10T at a velocity of 10^7 m/s, the electrons will go into cyclotron orbit. What is the direction of the orbit
The wheels, axle, and handles of a wheelbarrow weigh W = 59 N. The load chamber and its contents weigh WL = 691 N. Find the magnitude of the man's force for both designs
Suppose a constant ratio of 13.60 counts per minute per gram of living matter. A sample of a petrified tree was found to give 1.8 counts per minute per gram. How old is the tree.
A block of mass 2.50 kg is pushed 2.80 m along a frictionless horizontal table by a constant 14.0 N force directed 25.0° below the horizontal, Determine the work done by the applied force
A bullet of mass 6.0g is fired horizontally into a 2.6 kg wooden block atrest on a horizontal surface. At what speed is the bullet fired
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