In order to carry out this experiment properly, we would need to continuously measure both the mass of the LN2 and the temperature of the aluminum cylinder as it cools in the LN2 and integrate the above relation. This would be experimentally more complex to carry out! Fortunately, most of the LN2 boil-off occurs at the higher temperatures. Thus, using the approximation that cAl is independent of temperature (with a value ~900 J/kg-K), then from measuring the total mass of LN2 boiled off, the latent heat of vaporization of nitrogen is:
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Physics, 22.06.2019 04:30
Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?
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Physics, 22.06.2019 11:30
1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your
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In order to carry out this experiment properly, we would need to continuously measure both the mass...
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