Elevator that is supported by a cable
A 568- physics student stands on a bathroom scale in an 880- (including the student) elevator that is supported by a cable. As the elevator starts moving, the scale reads 480. If the scale reads zero, should the student worry? Explain.
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A long wire carrying a 5.0 A current perpendicular to the xy-plane intersects the x-axis at x= - 2.0 cm . A second, parallel wire carrying a 3.5 A current intersects the x-axis at x=+ 2.0cm .
Calculate the pH at the equivalence point for the titration of 0.20 M aniline (C6H5NH2, Kb = 3.8 x 10-10) with 0.20 M HCl. [Hint: remember the dilution factor caused by addition of titrant to the aniline solution.]
Treat the subskin tissue as a motionless conducting medium. The ambient air temperature under the same conditions is 11ºC. Calculate the heat transfer coefficient between skin and ambient air.
Calculate the value of Gibbs free energy change and the equilibrium constant under standard conditions for the following reactions. (Show all work to receive karma pts)
After you drive down to sea level, your tires have warmed to 25 degrees C. What pressure does your gage now indicate? Assume U.S. Standard Atmosphere.
A 5640 kg open railroad car coasts along with a constant speed of 8.60 m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 3.50 kg/min. Ignoring friction with the tracks, what is the speed of the car after 100.0 min
Calculate the value of the Faraday constant, F, from the charge of 1 electron, 1.602x10-19 C. (Show all work to receive karma) (Hint: what are the units of the faraday constant and Avogradro's number may be helpful)
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