1.
Spy balloon is to be constructed of a material with a mass of 0.5kg. it will be filled with helium and must be able to carry and instrument payload of 50kg at an altitude of 1000m where the density of the air is 1.16 kg/m^3. what mass of helium will be required.

2.
If the temperature of gas (measured in K) is doubled
a-the rms speed of the molecules doubles
b-the rms speed increases bh a factor of 2
c-the average kinetic energy quadruples
d-the average kinetic energy increases by a factor of 2

3.
A 1-liter container of nitrogen gas (N2) at a temperature of 23c is intially at a pressure of 1.25 atm. because of a slow leak the pressure falls to 1.15 atm 1 hour later what is the leak rate in molecules/second?

4.
How much energy is required to melt a 500cm^3 block of lead intitially at a temperature of 20c?

Solution Summary

The solution solves 4 questions on density, mass, temperature and pressure in an attached Word document with calculations shown.

... c) Pressure = density x gravity x height = 42527.1 g / cm s^2 ... d) The relationship between volume and pressure (at constant temperature) is directly ...

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... Critical Temperature: The temperature at the end of the line ... a liquid (no matter how much pressure is applied ... how to calculate atomic radius and density for bcc ...

... equation: Where is the absolute pressure [Pa] is the density is the ... Mass densities are determined ... start of a trip, a driver adjusts the absolute pressure in her ...

... in the atmosphere to an altitude, where the pressure is 360mmHg and the temperature is -14.1 ... Calculate the density of oxygen, O 2 , under each of the ...

... The air outside the balloon has a temperature of 20.2 ... inside the balloon is the same as the pressure of the ... Hint: First find the density of the air outside the ...

... the balloon lift @sea level, where the density of air ... the balloon ascends to 30,000 feet where pressure is 0.28 ... no volume change, what is the temp (in celsius ...

... of an object does not changes with temperature and hence. ... What gauge pressure must exist in the woman's mouth if ... Note: Assume the drink has a density of 1015 kg ...

... If the temperature were to suddenly increase, this would ... of the balloon (or, an increase in gas pressure). ... of the balloon has increased: density = mass/volume ...