Angular momentum and torque
Question: The angular momentum of a spinning wheel is 231 kg · m2/s. After application of a constant braking torque for 2.3 s, it slows and has a new angular momentum of 123 kg · m2/s. What is the torque applied?
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If the vial weights 185.56 g when filled with liquid mercury (d=13.53 g/cm^3), what is its volume? How much would the vial weight if it were filled with water (d=0.997 g/cm^3 at 25 C)?
What is the freezing depression if .25 moles of sodium chloride was dissolved in 350ml of water?
A transformer connected to a 120-V (rms) ac line is to supply 12. V (rms) to a portable electronic device. The total equivalent resistance of the system is 5.0 Ohm. What should the ratio of primary to secondary turns of the transformer be?
Compute the variable overhead rate and efficiency variances. What relation can you see between this efficiency variance and the labor efficiency variance?
What is the molarity of a 1025 mL ethanol/sugar solution that has a freezing point of -120.87 deg C. Freezing point of ethanol is -117.3 and has a density of .789 g/mL.
Calculate the value of n1/N, that is, the ratio of the number of nuclei in the first excited nuclear energy level to the number of of nuclei for a nucleus with e1 - e0 = 1MeV at 25C.
As a CFO of the University and a memeber of the Finance subcommittee of the Board of Trustees you have been asked to review the proposal and provide feedback.
Two thin slits are 0.050 mm apart. Monochromatic light of wavelength 634 nm falls on the slits. If there is a screen 6.0 m away, how far apart are adjacent interference fringes?
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