Two large semi-precious stones are discovered. A student is asked to find out what material each of the two stones is made of. The student does this by determining the density of the material of each stone. Figure 1 shows the two stones. The student wants to measure the volume of stone A. Stone A cannot be measured using a metre rule as the stone is an irregular shape. Describe how the student could determine the volume of stone A by putting it into water.

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.

moisture is lackin, and organic acids are scarce.