Newton’s Law of Cooling
PHXI11:THERMAL PROPERTIES OF MATTER

366644 The temperature of a body falls from \({52^{\circ} {C}}\) to \({36^{\circ} {C}}\) in 10 minutes when placed in a surrounding of constant temperature \({20^{\circ} {C}}\). What will be the temperature of the body after another 10 min? (Use Newton's law of cooling)

1 \({28^{\circ} {C}}\)
2 \({20^{\circ} {C}}\)
3 \({32^{\circ} {C}}\)
4 \({24^{\circ} {C}}\)
PHXI11:THERMAL PROPERTIES OF MATTER

366645 A pan filled with hot food cools from \(94^\circ C\) to \(86^\circ C\) in 2 minutes. When the room temperature is \(20^\circ C\). How long will it cool from \(74^\circ C\) to \(66^\circ C\) ?

1 2 minutes
2 2.8 minutes
3 2.5 minutes
4 1.8 minutes
PHXI11:THERMAL PROPERTIES OF MATTER

366646 The rates of cooling of two different liquids put in exactly similar surroundings are the same if

1 Equal masses of the liquids at the same temperature are taken
2 The masses of the liquid are equal
3 Heat capacities of the liquids must be same
4 None of the above
PHXI11:THERMAL PROPERTIES OF MATTER

366647 A body cools from \(80^\circ C\) to \(60^\circ C\) in 5 minutes.The temperature of the surrounding is \(20^\circ C\).The time it takes to cool from \(60^\circ C\) to \(40^\circ C\) is

1 \(420\;s\)
2 \(500\;s\)
3 \(450\;s\)
4 \(\dfrac{25}{3} s\)
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXI11:THERMAL PROPERTIES OF MATTER

366644 The temperature of a body falls from \({52^{\circ} {C}}\) to \({36^{\circ} {C}}\) in 10 minutes when placed in a surrounding of constant temperature \({20^{\circ} {C}}\). What will be the temperature of the body after another 10 min? (Use Newton's law of cooling)

1 \({28^{\circ} {C}}\)
2 \({20^{\circ} {C}}\)
3 \({32^{\circ} {C}}\)
4 \({24^{\circ} {C}}\)
PHXI11:THERMAL PROPERTIES OF MATTER

366645 A pan filled with hot food cools from \(94^\circ C\) to \(86^\circ C\) in 2 minutes. When the room temperature is \(20^\circ C\). How long will it cool from \(74^\circ C\) to \(66^\circ C\) ?

1 2 minutes
2 2.8 minutes
3 2.5 minutes
4 1.8 minutes
PHXI11:THERMAL PROPERTIES OF MATTER

366646 The rates of cooling of two different liquids put in exactly similar surroundings are the same if

1 Equal masses of the liquids at the same temperature are taken
2 The masses of the liquid are equal
3 Heat capacities of the liquids must be same
4 None of the above
PHXI11:THERMAL PROPERTIES OF MATTER

366647 A body cools from \(80^\circ C\) to \(60^\circ C\) in 5 minutes.The temperature of the surrounding is \(20^\circ C\).The time it takes to cool from \(60^\circ C\) to \(40^\circ C\) is

1 \(420\;s\)
2 \(500\;s\)
3 \(450\;s\)
4 \(\dfrac{25}{3} s\)
PHXI11:THERMAL PROPERTIES OF MATTER

366644 The temperature of a body falls from \({52^{\circ} {C}}\) to \({36^{\circ} {C}}\) in 10 minutes when placed in a surrounding of constant temperature \({20^{\circ} {C}}\). What will be the temperature of the body after another 10 min? (Use Newton's law of cooling)

1 \({28^{\circ} {C}}\)
2 \({20^{\circ} {C}}\)
3 \({32^{\circ} {C}}\)
4 \({24^{\circ} {C}}\)
PHXI11:THERMAL PROPERTIES OF MATTER

366645 A pan filled with hot food cools from \(94^\circ C\) to \(86^\circ C\) in 2 minutes. When the room temperature is \(20^\circ C\). How long will it cool from \(74^\circ C\) to \(66^\circ C\) ?

1 2 minutes
2 2.8 minutes
3 2.5 minutes
4 1.8 minutes
PHXI11:THERMAL PROPERTIES OF MATTER

366646 The rates of cooling of two different liquids put in exactly similar surroundings are the same if

1 Equal masses of the liquids at the same temperature are taken
2 The masses of the liquid are equal
3 Heat capacities of the liquids must be same
4 None of the above
PHXI11:THERMAL PROPERTIES OF MATTER

366647 A body cools from \(80^\circ C\) to \(60^\circ C\) in 5 minutes.The temperature of the surrounding is \(20^\circ C\).The time it takes to cool from \(60^\circ C\) to \(40^\circ C\) is

1 \(420\;s\)
2 \(500\;s\)
3 \(450\;s\)
4 \(\dfrac{25}{3} s\)
PHXI11:THERMAL PROPERTIES OF MATTER

366644 The temperature of a body falls from \({52^{\circ} {C}}\) to \({36^{\circ} {C}}\) in 10 minutes when placed in a surrounding of constant temperature \({20^{\circ} {C}}\). What will be the temperature of the body after another 10 min? (Use Newton's law of cooling)

1 \({28^{\circ} {C}}\)
2 \({20^{\circ} {C}}\)
3 \({32^{\circ} {C}}\)
4 \({24^{\circ} {C}}\)
PHXI11:THERMAL PROPERTIES OF MATTER

366645 A pan filled with hot food cools from \(94^\circ C\) to \(86^\circ C\) in 2 minutes. When the room temperature is \(20^\circ C\). How long will it cool from \(74^\circ C\) to \(66^\circ C\) ?

1 2 minutes
2 2.8 minutes
3 2.5 minutes
4 1.8 minutes
PHXI11:THERMAL PROPERTIES OF MATTER

366646 The rates of cooling of two different liquids put in exactly similar surroundings are the same if

1 Equal masses of the liquids at the same temperature are taken
2 The masses of the liquid are equal
3 Heat capacities of the liquids must be same
4 None of the above
PHXI11:THERMAL PROPERTIES OF MATTER

366647 A body cools from \(80^\circ C\) to \(60^\circ C\) in 5 minutes.The temperature of the surrounding is \(20^\circ C\).The time it takes to cool from \(60^\circ C\) to \(40^\circ C\) is

1 \(420\;s\)
2 \(500\;s\)
3 \(450\;s\)
4 \(\dfrac{25}{3} s\)