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You place a glass of 5°C water outside on a hot day when the temperature is 36°C

ID: 586304 • Letter: Y

Question

You place a glass of 5°C water outside on a hot day when the temperature is 36°C. In the first 10 minutes, the temperature of the water rises 5°C.

(a) Now that the water has been sitting out for 10 minutes, how quickly is it gaining heat compared to when it was first set out? Choose one answer only.
more slowlymore quickly     at the same rate (b) How much longer will it take the water to warm another 5°C? Choose one answer only. more than 10 minutesless than 10 minutes     10 minutes You place a glass of 5°C water outside on a hot day when the temperature is 36°C. In the first 10 minutes, the temperature of the water rises 5°C.

(a) Now that the water has been sitting out for 10 minutes, how quickly is it gaining heat compared to when it was first set out? Choose one answer only.
more slowlymore quickly     at the same rate (b) How much longer will it take the water to warm another 5°C? Choose one answer only. more than 10 minutesless than 10 minutes     10 minutes more slowlymore quickly     at the same rate more than 10 minutesless than 10 minutes     10 minutes

Explanation / Answer

According to Newton's law of cooling the rate of increase or rate of decrease in temperature will decrease with time

a) Now that the water has been sitting out for 10 minutes, how quickly is it gaining heat compared to when it was first set out? Choose one answer only.

more slowly

because its temperature difference with sorrounding will decrease

(b) How much longer will it take the water to warm another 5°C? Choose one answer only.

more than 10 minutes

Because its gaining heat at lesser rate

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