Molecular Physics | Thermodynamics Answers

Find the energy required to convert a 1 g cube of ice at

30°C to steam at 120°C

A basketball floats in a bathtub of water. The ball has a mass of 0.5 kg and a diameter of 22 cm.

(a) What is the buoyant force?

(b) What is the volume of water displaced by the ball?

(c) What is the average density of the basketball?

You can use g = 9.8 m/s2

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A balloon has a volume of 25.0L on a day when the temperature is 30.0 °C. If the temperature at night falls to 10.0 °C, what will be the volume of the balloon if the pressure remains constant?

xygen ( molecular weight 32) is compressed reversibly and polytropically in a

cylinder from 1.05 bar, 15oC to 4.2bar in such a way that one- third of the work input

is rejected as heat to the cylinder walls . calculate the final temperature of the oxygen.

Assume oxygen to be aperfect gas and take Cv = 0.649kJ/kg.K

Three 45-Ω lightbulbs and three 75-Ω lightbulbs are connected in series. (a) what is the total resistance of the circuit? (b) what is their resistance if all six are wired in parallel? (c) Show the circuit illustration.

A 3.00-µF and 4.00-µF capacitor are connected in series, and this combination is connected in parallel with a 2.00-µF capacitor. (a) Show the illustration (b) What is the net capacitance?

Oil flows through a pipeline which contracts from 450mm diameter at A to 300mm diameter at B and then forks, one branch being 150mm diameter discharging at C and the other branch 225mm diameter discharging at D. if the velocity at A is 1.8 m/s and the velocity at D is 3.6 m/s, what will be the discharges at C & D and the velocity at B & C

The atmosphere of Venus is 96.5% CO2 and 3.5% N2 by weight. The pressure at the surface is 92 bar (1 bar = 101,325 Pa). The density of Venus’ atmosphere is 65 Kg/m3 at the surface. The gas constant for CO2 is 188.92 J/kg-K and for N2 is 296.80 J/kg-K. Assume all of these values have relative uncertainties of +/- 1%. The ideal gas law can be written asP (Pa) /ρ (kg/m3) = R (J/kg-K) T (K)Give all your answers in terms of X +/- Y where X is the expected value and Y is the absolute uncertainty of X.a. What is the average gas constant for Venus’ atmosphere?b. What is the predicted surface temperature of Venus by the ideal gas law?c. Research the actual measured surface temperature of Venus. How well does the ideal gas law predict the surface temperature of Venus?

A charge is placed in a uniform electric field of 9.8 newtons per coulomb. Calculate the magnitude of the electric force felt by the 9.7 -coulomb charge.

You are on a merry go round with radius 6.1 m. What is the centripetal force on you if your velocity is 2.7 m/s and you weigh 7.5 kilograms?