Technician A says that rotor thickness variation is a major cause of a pulsating brake pedal. Technician B says that at least 0.015 in. (0.4 mm) should be left on a rotor after machining to allow for wear. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
C
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Saturated liquid water at 200 kPa enters an insulated mixing chamber at a rate of 15 kg/s. The water is mixed with superheated steam at 200 kPa and 125oC. The combined flow will exit as a saturated mixture at 200 kPa. Using your mixing chamber model to calculate the data, plot the quality of the combined exit flow for superheated steam entrance flow rates ranging from 5 kg/s to 200 kg/s.
State 1: Liquid inlet; State 2: Steam inlet; State 3: Outlet Given: P1 = P2 = P3 = 200 kPa; x1 = 0.0; T2 = 125oC; x3 = 1.0; m?1= 15 kg/s Assume: Q?=0 (insulated). Given no other information regarding the mixing chamber, make the following common assumptions: W?=?KE=?PE=0 Also, assume the mixing chamber is a multiple-inlet, single-outlet, steady-state, steady-flow device.
It is important not to plant strawberries in soil recently planted with tomatoes, potatoes, or peppers, because _____
A) these plants spread verticillium, which attacks strawberry plants B) these plants spread red stele, which attacks strawberry plants C) the previous plant's roots remain, and they will suffocate the strawberry's roots D) none of the above
In a simple random sample of 70 automobiles registered in a certain state, 28 of them were found to have emission levels that exceed a state standard.
a. What proportion of the automobiles in the sample had emission levels that exceed the standard? b. Find a 95% confidence interval for the proportion of automobiles in the state whose emission levels exceed the standard. c. Find a 98% confidence interval for the proportion of automobiles whose emission levels exceed the standard. d. How many automobiles must be sampled to specify the proportion that exceed the standard to within ±0.10 with 95% confidence? e. How many automobiles must be sampled to specify the proportion that exceed the standard to within ±0.10 with 98% confidence? f. Someone claims that less than half of the automobiles in the state exceed the standard. With what level of confidence can this statement be made?