If the voltage amplitude across an 8.50-nF capacitor is equal to 12.0 V when the current amplitude through it is 3.33 mA, the frequency is closest to:
A) 32.6 kHz B) 5.20 MHz C) 32.6 Hz D) 5.20 kHz E) 32.6 MHz
B
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A two-shell-eight-tube-pass heat exchanger condenses 3 kg/s of ammonia at 45ºC using 65 kg/s of water at 20ºC. If the ammonia enters as saturated vapor, leaves as saturated liquid, and has a heat of vaporization of 1078 kJ/kg, determine (a) outlet water temperature and (b) heat exchanger effectiveness.
What will be an ideal response?
Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C The 1 kg block of ice melts into water. The amount of heat absorbed by the ice as it melts is 334,000 J
Indicate whether the statement is true or false
It is more difficult to measure the coefficient of volume expansion of a liquid than that of a solid because:
A. no relation exists between linear and volume expansion coefficients B. a liquid tends to evaporate C. a liquid expands too much when heated D. a liquid expands too little when heated E. the containing vessel also expands
Two bodies with masses m1 and m2 are both moving east with velocities of magnitudes v1 and v2, where v1 is less than v2 . The magnitude of the velocity of the center of mass of this system of two bodies is
a. less than v1. b. equal to v1. c. equal to the average of v1 and v2. d. greater than v1 and less than v2. e. greater than v2.