A Cummins ISX is rated at 625 BHP. Convert to kilowatts:
A. 448 kw
B. 466 kw
C. 485 kw
D. 493 kw
Answer: B
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Answer the following statement(s) true (T) or false (F)
1. The human ear detects all frequencies equally. 2. A sound wave cannot exist at various different frequencies. 3. Any two sounds whose frequencies make a 2:1 ratio are said to be separated by an octave. 4. The Potential Acoustic Gain Formula states that as the listeners double their distance from the sound source, the sound pressure level they perceive will decrease by 6dB. 5. Low frequencies are direct line of sight.
John Brown's execution produced all of the following results EXCEPT
A. Harriet Tubman praised Brown's support of freedom for slaves. B. abolitionists and Free Soilers were outraged. C. Ralph Waldo Emerson and other northerners hailed him as a martyr, much like Jesus. D. Southerners wondered how they could stay in the Union. E. Brown's bloody past prior to the Harper's Ferry raid was exposed and he was discredited.
N2 gas fills a flexible container with an initial volume of 0.05 m3, a temperature of 30oC, and a pressure of 800 kPa. The N2 gas is to expand in an isothermal manner until the pressure is 100 kPa.
(a) Determine the amount of heat transfer required for this process in order to maintain an isothermal nature. (b) Develop a computer model to simulate this process, and then plot the amount of heat transfer required for an isothermal process for final pressures ranging between 100 kPa and 600 kPa. Given: N2; T1 = T2 = 30oC; P1 = 800 kPa; V1 = 0.05 m3; P2 = 100 kPa Assume: N2 behaves as an ideal gas with constant specific heats: cv = 0.743 kJ/kg-K; R = 0.2968 kJ/kg-K; ?KE = ?PE = 0.
Briefly describe three important safe work habits.
What will be an ideal response?