Lab 1 B

Objectives

1. Calibrate a thermometer

2. Dimension analysis

3. Generate a graph on excel

A typical thermometer is a calibrated, or numbered, glass tube containing mercury.

The silver mercury in the tube rises, or expands, when warmth of an object increases.

.

There are three systems for measuring temperature. Fahrenheit Celsius Kelvin

Fahrenheit.

The first scale is measured in degrees Fahrenheit.

The range from freezing point to boiling point on this scale is 32 to 212 degrees.

Celsius

The other scale is measured in degrees Celsius.

. The range from freezing point to boiling point on this scale is 0 to 100 degrees.

Temperature Conversion Table

From

Fahrenheit (F o to C o) (F - 32) * 5/9

Celsius (C o to F o) (C * 9/5) + 32

Kelvin (C o to Ko) C + 273

Dimensional analysis A way to convert one unit into another unit

Math Start with what is given.  If the problem is in the form of a math

equation (ex. 36 eggs = ______________ dozen, it’s the number written first.

36 eggs

Don’t bother with the numbers, look at the units !!

Whatever the units your first number has, put that down below diagonally in the next blank.

36 eggs

eggs

Conversions

Decide what you have to convert the unit you just wrote into.

Put the conversion unit above

A conversion is a unit that has an equivalent value to another unit

Important conversions 1 cm3 = 1 ml

1 inch = 2.54 cm 1meter = 1000mm

1km = 1000m 1m= 100 cm

36 eggs

eggs

Dozen

For each conversion, ask which unit is larger put a 1 next to it

36 eggs

eggs

Dozen1

Ask yourself how many of the other units are in the larger unit. Fill in the other number

36 eggs

eggs

Dozen1

12

Cancel units that divide out

36 eggs

eggs

Dozen1

12

Do the math. Multiply across the top write the number

down. Multiply across the bottom write the number

down, Divide the two numbers. That is your answer.

36x 1 = 36 1 x12 = 12 36 / 12= 3 dozen

Example 1 200 seconds is how many minutes

200 sec

60 sec

1 min

200 min / 60 =3.3 min

Example 2 2000 seconds is how many days

2000 sec

60 sec

1 min

2000 Hours / 3600 =0.55 hours

60 min

1 Hour

Example 3 200 mg/ml is how many grams / L

200 mg

1000 mg

1 gram

ml

1000 ml

1 L

Generating a graph

y = 1.0638x - 2.1277

0

20

40

60

80

100

120

0 50 100 150

ob

serv

e

Series1

Linear (Series1)

Y XObserved Temp True temp

2 096 100

Directions for creating a trendline 1. Determine and label X and Y axis 2. Highlight numerical data 3. Click graph icon 4. Choose scatter graph 5. Determine if your data is in colums or rows 6. Label graph and x and y axis 7. Generate graph 8. Click on data points in graph 9. Click on chart tab 10. Click on add trendline and Choose linear 11. Click on options and click on display equation on chart