Molecular Physics | Thermodynamics Answers

Find the gauge pressure (in psi) at the bottom of a freshwater swimming pool that is 12.7 ft deep.

4000J of heat is applied to 1.5 silver pendant initially at temperature of 150°C. Determine it's final temperature (latent heat=336J/Kg, heat capacity = 233J/Kg.K)

A scale reads 274 N when a piece of brass is hanging from it. What does it read (in N) when it is lowered so that the brass is submerged in water?

Air flows through a heating duct with a square cross-section with 6-inch sides at a speed of 4.5 ft/s. Just before reaching an outlet in the floor of a room, the duct widens to assume a square cross-section with sides equal to 15 inches. Compute the speed of the air flowing into the room (in ft/s), assuming that we can treat the air as an incompressible fluid.

A metal bowl with a weight of 1.75 N is placed in a larger kitchen container filled with corn oil. How much corn oil must the bowl displace in order to float? For reference, the mass density of corn oil is about 900 g/liter and its weight density is about 8.82 N/liter. Please give your answer in liters.

A block of lead of mass 100kg in a crucible and at a temperature of 40 degree Celsius was placed in an electric furnace rated 10kw. If the melting point of lead is 320 degree Celsius, calculate the
(i) quantity of heat required to heat the lead to its melting point.
(ii) additional heat energy required to melt the lead.
(iii) time taken to supply this additional energy specific heat capacity of lead = 120J/kgk, specific latent heat of fusion of lead = 25000J/kg

1kg of fluid is expanded reversibly according to the law pv=0.5 where p is in bar and v is in m^3/kg. if the final volume is four times the initial volume.Calculate the work done by the fluid and sketch the process on a pv-diagram

Radiation is contained in a volume V and has pressure P and total energy E .
Justify the correct value of PV
Answer: E/3

Another name of partition function in statical mechanics
1)sum over states
2)Addition of states
3) multiplication of states
4) Substraction of states

A large truck tire is inflated to a gauge pressure of 88 psi. The total area of one sidewall of the tire is 1,220 in2. What is the net outward force (in lb) on the sidewall because of the air pressure? (Enter the magnitude.)