2. A 70.0-g aluminum calorimeter contains 390 g of water at a temperature of 20°C. Then a 160-g piece of metal, initially at 271°C, is added to the calorime temperature of 32°C. What is the specific heat capacity of the metal? The specific heat capacity of aluminum is 910 J/kg - K, and of water is 4190 J/kg
490 J/kg.
408 J/kg K
O 360 J/kg.
588 J/kg-K
533 J/kg-K

Answer///air resistance,drag;

The relationship of both of them

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Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.