Magnitude of the friction force required for the car
A 1900 kg car rounds a curve of radius 70 m banked at an angle of 12 °. What is the magnitude of the friction force required for the car to travel at 86 km/h
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A piston cylinder has R-134a at -20oC, 100 kPa which is compressed to 500 kPa in a reversible adiabatic process. Find the final temperature and the specific work.
A closed tank, V = 10 L, containing 5 kg of water initially at 25°C, is heated to 175°C by a heat pump that is receiving heat from the surroundings at 25°C. Assume that this process is reversible. Find the heat transfer to the water an
The distribution of the monthly costs does not follow the normal distribution. In fact, it is positively skewed. What is the probability of selecting a sample of 55 c to be at least $1,985 per month?
The valve is opened and heat is transferred so that the water comes to a uniform state with a total volume of 1.006 m3. Find the total mass of water and the total initial volume. Find the work and the heat transfer in the process.
Assume this can be done in a reversible process by the use of heat engines and neglect kinetic energy changes. Find the water exit temperature and the power out of the heat engine(s).
For the isomerization of n-butane to isobutene we have G= -RT LnK where R= 1.9872 and K= (isobutene)/(n-butane) The temperature dependent Gibbs free energy (in calories) for isobutene and nbutane are given by G= -31450 - 70.42 T and G= -29810- 74.
Determine Radial and tangential stresses as functions of r. Calculate these stresses at a minimum of 7 radial positions and plot your results.
Find the specific flow exergy in and out of the steam turbine in Example 9.1 assuming an ambient at 293 K. Use the exergy balance equation to find the reversible specific work. Does this calculation of specific work depend on To?
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