# solved: 1. The Eiffel Tower (the figure) is built of wrought iron…

1. The Eiffel Tower (the figure) is built of wrought iron…1. The Eiffel Tower (the figure) is built of wrought iron approximately 300 m tall. Assume the coefficient of thermal expansion of wrought iron is 12 ×10^-6 1/degree CEstimate how much its height changes between January (average temperature of 2 degree°C) and July (average temperature of 25 degree °C). Ignore the angles of the iron beams and treat the tower as a vertical beam. 2. If 2.66 m^3 of a gas initially at STP is placed under a pressure of 3.37 atm , the temperature of the gas rises to 33.0 degree C.What is the volume? 3.If 16.92 mol of helium gas is at 11.9 degree °C and a gauge pressure of 0.375 atm .Calculate the volume of the helium gas under these conditions.calculate the temperature if the gas is compressed to precisely half the volume at a gauge pressure of 1.22 atm . 4. A storage tank contains 21.6 kg of nitrogen (N2)at an absolute pressure of 4.05 atm .What will the pressure be if the nitrogen is replaced by an equal mass of CO2? 5. The lowest pressure attainable using the best available vacuum techniques is about 10^-12 N/m^2At such a pressure, how many molecules are there per cm^3 at 4 degree C? 6. Calculate the rms speed of helium atoms near the surface of the Sun at a temperature of about 6300 K. 7. A gas is at 26 degree C.To what temperature must it be raised to triple the rms speed of its molecules? 8. What is the air pressure at a place where water boils at 40 degree C? 9. If the humidity in a room of volume 400 m^3 at 25 degree C is 60 % , what mass of water can still evaporate from an open pan? 10. A thermometer tells you that you have a fever of 37.5 degree C.What is this in Fahrenheit? SciencePhysics PLSC 101

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