A0.0811 kg ice cube at 0 °c is dropped into a styrofoam cup holding 0.397 kg of water at 14.8 °c. calculate the final temperature of the system. assume the cup and the surroundings can be ignored.

The final temperature of the system is 16.4°C.

Explanation:

Given that,

Mass of ice cube = 0.0811 kg=81.1 g

Mass of water = 0.397 kg = 397 g

Initial temperature of ice cube = 0°C=273 K

Initial temperature of water = 14.8°C = 14.8+273=287.8 K

We need to calculate the final temperature

We know that,

Specific capacity of solid = 2.09 J/g°C

Using formula of energy

Put the value into the formula

Hence, The final temperature of the system is 16.4°C.  

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.