A river has a steady speed of 0.42ms. a student swims, Ask an Expert

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Q1. A river has a steady speed of 0.42m/s. A student swims upstream a distance of 1 km and swims back to the starting point. If the student can swim at a speed of 1.25 m/s in still water, how long does the trip take?

Q2. A 1.5 liter flask contains a certain quantity of ideal gas at 310K. Then an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.35 times its original value. What is the final temperature?

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Category:- Physics
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