A water rocket can reach a speed of 75 m/s in 0.050 seconds from launch. What is its average acceleration?
What will be an ideal response?
1500 m/s2
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Saturated methyl chloride at 430 kPa(abs) condenses on a horizontal 10*10 bank of tubes. The 5 cm-OD tubes are equally spaced and are 10 cm apart center-to-center on rows and columns. If the surface temperature of the tubes is maintained at 7°C by pumping water through them, calculate the rate of condensation of methyl chloride in kg/(m s).
GIVEN
? Saturated methyl chloride condensing on a ten-by-ten bank of horizontal tubes
? Pressure = 430 kPa
? Tube outside diameter (D) = 5 cm= 0.05 m
? Tube center-to-center spacing (s) = 10 cm= 0.1 m
? Methyl chloride properties given above
? Tube surface temperature (Ts) = 70C
FIND
? The rate of condensation (
m
/L) in kg/(m s)
ASSUMPTIONS
? Steady state
? Laminar flow condensation
? Interfacial shear is negligible
? Tube surface temperature is uniform and constant
? Vapor density is negligible compared to the liquid density
SKETCH
The binding energy per nucleon
A) decreases steadily as we go to heavier elements. B) increases steadily as we go to heavier elements. C) is approximately constant throughout the periodic table, except for very light nuclei. D) has a minimum near iron in the periodic table.
When the frequency of the source of a water wave increases, the speed of the waves traveling in the water increases
a. True b. False Indicate whether the statement is true or false
A beam of light with a frequency range of 3.01 × 1014 Hz - 6.10 × 1014 Hz is incident on a metal surface. If the work function of the metal surface is 2.20 eV,
what is the range of frequencies in this beam of light that will be responsible for ejecting electrons from this metal surface? A) 1.12 × 1014 Hz - 5.31 × 1014 Hz B) 1.12 × 1014 Hz - 3.10 × 1014 Hz C) 3.01 × 1014 Hz - 6.10 × 1014 Hz D) 5.31 × 1014 Hz - 6.10 × 1014 Hz E) None