Find exit velocity and the exit kinetic energy of stream
Steam entering a nozzle has an enthalpy of 3200 kJ/kg and its intial velocity is 75 m/s. The exit stream has an enthalpy of 2000 kJ/kg. What is the exit velocity and the exit kinetic energy of the stream?
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An electric motor drives a propeller inside the tank until the temperature of the air has risen to 400 K. How much work had to be done by the motor to raise the air temperature by this amount?
John Jay takes a random sample of 23 Quarer Pounders. they have a mean weight of 4.08 ounces with a standard deviation of .17 ounces assume burger weights are normally distributed. What is an appropriate null hypothesis, H0?
The molecular weight of bleach (Sodium Hypochlorite NaClO) is 74.35 gms and the room temperature is 300K. Ignore convective currents.
An air-tight room is filled with air. The room is divided into two sections by a barrier. One side of the room has a volume of 1000 ft3, a temperature of 70°F, and a pressure of 1 atm.
Let Q be a random variable which is uniformly distributed between 0 and 1. On any given day, a particular machine is functional with probability Q. Furthermore, given the value of Q, the status of the machine on diifferent days is independent.
A 4-m-long string, fixed at both ends, has a mass of 8 g. If you want to set up a standing wave in this string having a frequency of 280 Hz and three antinodes, what tension should you put the string under?
If a coin is flipped 25 times with eight tails occuring, what is the probability that no run of six (or more) consecutive heads occur? (Solve using generating funciton)
If we wish to obtain a vapor product with at least 75 mol% meethanol and want to have 30% of the feed vaporized [V/F=0.3], determine the required feed composition.
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