force of buoyancy applied to the sphere ball with the diameter of 10 m when 30% of the volume is under water?

A pressure cooker contains water and steam in equilibrium at a pressure greater than atmospheric pressure. How does this greater pressure increase cooking speed?

A high-pressure gas cylinder contains 50.0 L of toxic gas at a pressure of 14107 N/m2 and a temperature of 25.0 . The cylinder is cooled to dry ice temperature ( 78.5 ) to reduce the leak rate and pressure so that it can be safely repaired. (a) What is the final pressure in the tank, assuming a negligible amount of gas leaks while being cooled and that there is no phase change? (b) What is the final pressure if one-tenth of the gas escapes? (c) To what temperature must the tank be cooled to reduce the pressure to 1.00 atm (assuming the gas does not change phase and that there is no leakage during cooling)? (d) Does cooling the tank as in part (c) appear to be a practical solution?

In state-of-the-art vacuum systems, pressures as low as 1.00 x 10-9 Pa are being attained. Calculate the number of molecules in a 2.00-m³ vessel at this pressure and a temperature of 30.0°C. molecules Need Help? Read It Watch It

An infrared heater for a sauna has a surface area of 0.050 m2 and an emissivity of 0.84. What temperature must it run at if the required power is 360 W? Neglect the temperature of the environment.

The density of water at 0 C is very nearly 1000 kg/m3 (it is actually 999.84 kg/m3), whereas the density of ice at 0 C is 917 kg/m3. Calculate the pressure necessary to keep ice from expanding when it freezes, neglecting the effect such a large pressure would have on the freezing temperature. (This problem gives you only an indication of how large the forces associated with freezing water might be.)

Noting the large stresses that can be caused by thermal expansion, an amateur weapon inventor decides to use it to make a new kind of gun. He plans to jam a bullet against an aluminum rod inside a closed invar tube. When he heats the tube, the rod will expand more than the tube and a very strong force will build up. Then, by a method yet to be determined, he will open the tube in a split second and let the force of the rod launch the bullet at very high speed. What is he overlooking?

Under what circumstances would you expect a gas to behave significantly differently than predicted by the ideal gas law?

Typical molecular speeds (vrms) are large, even at low temperatures. What is vrms for helium atoms at 5.00 K, less than one degree above helium's liquefaction temperature ?

Most cars have a coolant reservoir to catch radiator fluid that may overflow when the engine is hot. A radiator is made of copper and is filled to its 16.0-L capacity when at 10.0 . What volume of radiator fluid will overflow when the radiator and fluid reach a temperature of 95.0 , given that the fluid's volume coefficient of expansion is =400106/C? (Your answer will be a conservative estimate, as most car radiators have operating temperatures greater than 95.0 ).