What area must a heating duct have
What area must a heating duct have if air moving at 3.00 m/s along it can replenish the air every 15 minutes in a room of volume of 300 m cubed? Assume the density remains constant.
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If the speed of the rod in circuit 1 were twice that in circuit 2, what would be the ratio P1/P2 of the powers in the circuits?
A fisherman's scale stretches 3.6 cm when a 2.7kg fish hangs from it. A) what is the spring stiffness constant and B) what will be the amplitude and frequency of vibration if the fish is pulled down 2.5cm more and released so that it vibrates up a
Steam flows at steady state trough a converging, insulated nozzle, 25 cm long and with an inlet diameter of 5 cm. At thenozzle entrance (state 1), the temperature and pressure are 325 Cand 700 kPa, and the velocity is 30 m/s.
Complaints about an Internet brokerage firm occur at a rate of 7 per day. The number of complaints appears to be Poisson distributed. Find the probability that the firm receives 31 or more complaints in a 5-day period.
Cars arriving for gasoline at a Shell station follow a Poisson distribution with a mean of 7 per hour. Determine the probability that over the next hour, only one car will arrive.
A certain typing agency employs two typists. The average number of errors per article is 4.1 when typed by the first typist and 1.5 when typed by the second. If your article is equally likely to be typed by either typist, find the probability that
The spring constant is such that to compress the spring 100 cm a force of 360 kN is needed. At the end, the pressure in the cylinder is 7 MPa. Obtain: a) final state properties. b) the work done for this process.
One of the mirrors in a Michelson interferometer is moved a distance of 2.0 mm. Meanwhile, the interference intensity moves through 5735 dark fringes. What is the wavelength of the light?
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