Suppose a 96.10 kg hiker has ascended to a height of 1841 m above sea level in the process of climbing mt. washington. by what percent has the hiker's weight changed from its value at sea level as a result of climbing to this elevation? use g=9.807 m/s2 and r=6.371×106 m . keep four significant figures in your weight calculation to find the percent difference, and enter your answer as a positive value.

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

Which of the following statement is false

8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.