Brake pads may have slots or holes to help prevent gas fade
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TRUE
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Because class B amplifiers and class AB amplifiers have ____, they can be used as large signal amplifiers, which provide power greater than 0.5 W.
a. high efficiency b. low efficiency c. high fidelity d. low distortion
Suppose the current through a wire is given by the curve shown in Figure P2.9. a. Find the amount of charge q that flows through the wire between t1 = 0 and t2 = 1 s. b. Repeat part a for t2 = 2, 3, 4, 5, 6, 7, 8, 9, and 10 s. c. Sketch q(t) for 0 ? t ? 10 s.
What will be an ideal response?
A gas, initially at T=500 K, undergoes a Joule-Thompson (constant enthalpy) expansion from P=10 atm to P=1 atm.
A) Prove that (dT/dP)H is equal to: (1/Cp)[T(dV/dT)P – V] (You may assume this expression is valid for parts B and C, even if you are unable to prove it.) B) Find an expression for (dV/dT)P for this gas, in terms of P, T and known constants, assuming it follows the equation of state: V = (RT/P) + aT2P2 For full credit your answer should be an algebraic equation—all derivatives should be evaluated. C) Assuming the heat capacity of the gas is constant at Cp=5R, and that ‘a’ is constant at 2x10-7 L mol-1K-2atm-2, find the final temperature of the gas.
Extreme preservationists would halt the construction of a needed highway because a swamp would have to be drained
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