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The Bell-Boeing V-22 Osprey Tiltrotor is both an airplane and a helicopter. Its advantage is the ability to rotate its engines to a vertical position, as shown in Figure P7.33 (a), for takeoffs and landings and then switch the engines to a horizontal position for cruising as an airplane. The altitude control system in the helicopter mode is shown in Figure P9.20. (a) Obtain the frequency response of the system for K = 100. (b) Find the gain margin and the phase margin for this system, (c) Select a suitable gain K so that the phase margin is 40°. (Decrease the gain above K = 100.) (d) Find the response y(t) of the system for the gain selected in part (c).
FIGURE P7.33
The equation for the line of best fit is given as Y = 1.8x + 28.7, and the Pearson correlation coefficient was 0.61. Was the correlation coefficient significantly different from zero? Use α = 0.05.
We investigate if a period of time feels longer or shorter when people are bored compared to when they are not bored. Using independent samples, we obtain these estimates of the time period (in minutes):
in a normal distribution with u mu90 and o sigma15 find the proportion of data values between 80 and
of the three levels of strategy that are part of an organizations decision-making hierarchy which level develops annual
a study of on-time performance for an airline shows that 20 of their flights take off late. seventy percent of flights
A statistics instructor collected data on the time it takes the students to complete a test. The test taking time is uniformly distributed within a range of 35 minutes to 55 minutes.
In addition, record the values for the UCL, center line, and LCL. Also, record any points that are out of control. Use a z-value of three.
assume you have any given amino acid sequence. the average length of an non-helical region is 20 amino acids long.
a company has observed that there is a linear relationship between indirect labor expense ile in dollars and direct
It is estimated that 26% of all California adults are college graduates and that 31 % of California adults are regular internet users. It is also estimated that 20% of California adults are both college graduates and regular internet users.
The famous Y.S Chang Restaurant is open 24 hours a day. Waiters and busboys report for duty at 3 am, 7 am, 11am, 3pm, 7pm or 11pm, and each works an 8-hour shift. The following table shows the minimum number of worker needed during the six periods..
If the sales are $150,000 per month, determine how much the company can expect to receive of this amount.
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