Loading problems are typically caused by ________
A) noisy supply voltages B) overclocking
C) fan-out D) fan-in
C
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What is the main benefit of using a robot to perform a dangerous job like reconnaissance in a hostage situation or dealing with explosive devices?
What will be an ideal response?
A simple insulated concentric tube heat exchanger is used to cool hot water by transferring heat to cool air. Hot water enters the center tube at 200oF, and a mass flow rate of 6.5 lbm/s. The water exits the heat exchanger at 100°F. Air flows through the annulus surrounding the central tube. The air enters at 50°F.
(a) If the air exits at 95°F, determine the mass flow rate of the air. (b) Using your heat exchanger model to acquire the data, plot the required mass flow rate of the air for air exit temperatures ranging from 55°F to 100°F. (c) Consider that the maximum allowed exit temperature of the air is 90°F. Plot the maximum exit water temperature as a function of the mass flow rate of the air for air mass flow rates varying between 5 lbm/s and 70 lbm/s. Consider the specific heat of the air to be 0.240 Btu/lbm-R, and the specific heat of the liquid water to be 1.00 Btu/lbm-R. Consider State 1 to be the water inlet and State 2 to be the water outlet. Consider State 3 to be the air inlet and State 4 to be the air outlet. Given: T1 = 200°F; m? w = 6.5 lbm/s; T2 = 100°F T3 = 50°F, T4 = 95°F Assume: Q? = 0 (insulated). Also, given no other information regarding the heat exchanger, make the following common heat exchanger assumptions: W? = ?KE =?PE = 0 Also, assume the heat exchanger is a multiple-inlet, multiple-outlet, steady-state, steady- flow device. What will be an ideal response?
Los circuitos de artefactos hogareños pequeños deben tener una capacidad nominal de:
a. 1.200 VA. b. 1.500 VA. c. 1.920 VA. d. 2.400 VA.
What has prevented the use of carbon composites in frames and unitized bodies?
What will be an ideal response?