1. Suppose that an insulating container of negligible mass contains 0.17 kg of w

Question

1. Suppose that an insulating container of negligible mass contains 0.17 kg of water at a temperature of 10 degrees C. Now suppose 75 g of ice initially at a temperature of -31 degrees C is added to the water. Assuming no transfer of heat to or from the surroundings, what is the final mass (in grams) of the ice (if any) that remains in the system?

2. On a windless day, a 34-mg snowflake falls a distance of 838 m vertically at a constant rate. Over this period, what was the absolute value of the work W (in J) done by air resistance on the snowflake?

Explanation / Answer

Here ,

initial temperature , Ti = -31 degree C

let the amount of ice left is m gm

heat lost by ice = heat gain by water

(75 - m) * ( 2.03 * ( 31 ) + 334 ) = 170 * 4.186 * (10)

solving for m

m = 57.1 gm

the mass of remaining ice is 57.1 gm

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