You measure the mass of an apple using a balance. You get these three measurements: Trial 1: 167.0 g Trial 2: 166.9 g Trial 3: 167.2 g You know that the true mass of the apple is 172 g. Describe your results in terms of precision and accuracy. Explain your answer.

Explanation:

The three results are precise. This is because they are all within 0.3 g of one another. However, the results are not accurate, because they are all about 5 g away from the correct value for the mass of the apple.

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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.