Chapters

## Exercise 1

A Roman emperor was born in B.C. and died in A.D. How many years did he live?

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## Exercise 2

A bomb displaces the oil in a well from m deep and raises it to a deposit place m above ground level. How far does the oil displace?

## Exercise 3

What is the change in temperature a customer in a grocery store experiences when they walk from the chilled vegetable section at ºC to the frozen fish section which is set to ºC?

## Exercise 4

The air temperature in the atmosphere decreases at the rate of ºC every meters. What height would a plain have to fly to experience a temperature of ºC? The temperature is º C at sea level.

## Exercise 5

In a well, there is liters of water. At the top, there is a pipe that deposits l per minute into the well, and at the bottom, there is another pipe that withdraws l per minute from the same well. How many liters of water will there be in the well after minutes of the pipes functioning?

## Solution of exercise 1

A Roman emperor was born in B.C. and died in A.D. How many years did he live?

years

## Solution of exercise 2

A bomb displaces the oil in a well from m deep and raises it to a deposit place m above ground level. How far does the oil displace?

meters

## Solution of exercise 3

What is the change in temperature a customer in a grocery store experiences when they walk from the chilled vegetable section at ºC to the frozen fish section which is set to ºC?

ºC ºC ºC

ºC ºC ºC ºC ºC ºC

The temperature difference in absolute value is equal in both cases. The minus sign of the first case tells us that it produces a drop in temperature, and the plus sign of the second case, an increase.

## Solution of exercise 4

The air temperature in the atmosphere decreases at the rate of ºC every meters. What height would a plain have to fly to experience a temperature of ºC? The temperature is º C at sea level.

m

## Solution of exercise 5

In a well, there is liters of water. At the top, there is a pipe that deposits l per minute into the well, and at the bottom, there is another pipe that withdraws l per minute from the same well. How many liters of water will there be in the well after minutes of the pipes functioning?

l

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