Conversion ActivityConversion Activity

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BellworkBellwork

What is scientific notation?What is scientific notation?

It is a way to write very large or It is a way to write very large or very small numbers in a compact very small numbers in a compact way way

AgendaAgenda

Check off homeworkCheck off homework

BellworkBellwork

Go over homeworkGo over homework

Start conversion activityStart conversion activity

Scientific NotationScientific Notation

The coefficient identifies the The coefficient identifies the amount of sig. figs.amount of sig. figs.

Metric / English ConversionsYou will be given a set of conversion

factors, common ones are:

• 1 in. (inch) = 2.54 cm (centimeters)

• 1 ft (foot) = 0.3048 m (meters)

• 1 mile = 1.61 km (kilometers)

• 1 oz (ounce) = 28.35 g (grams)

• 1 lb (pound) = 454 g (grams)

• 1 qt (quart) = 0.479 L (liters)

Calculating SpeedCalculating Speed

Calculating SpeedCalculating Speed

Throwing a ball across the room:Throwing a ball across the room:

distance = 14.5 mdistance = 14.5 m

time = 0.451 stime = 0.451 s

speed = 32.2 m/sspeed = 32.2 m/s

Converting m/s to km/hrConverting m/s to km/hr

Convert 32.2 m/s to km/hrConvert 32.2 m/s to km/hr

Answer: 116 km/hrAnswer: 116 km/hr

Converting km/hr to mphConverting km/hr to mph

Convert 116 km/hr to mile/hrConvert 116 km/hr to mile/hr

Answer: 72.0 mile/hrAnswer: 72.0 mile/hr

Conversion ActivityConversion Activity

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Pre-LabPre-Lab

Copy down the data tableCopy down the data table

Title:Activity / Distance (m)

Time 1 (s)

Time 2 (s)

Time 3 (s)

Time 4 (s)

Time 5 (s)

Collecting DataCollecting Data

IMPORTANT!!!IMPORTANT!!!

When measuring be as precise When measuring be as precise as you can be!!!as you can be!!!

Distances should be in meters Distances should be in meters (Oh no! I have to convert!)(Oh no! I have to convert!)

Class Wrap-UpClass Wrap-Up

Please leave the rulers on the Please leave the rulers on the desksdesks

Lab tables as you found themLab tables as you found them

Hand back lab procedures (to the Hand back lab procedures (to the basket at the end of class)basket at the end of class)

Homework: #107-132 due Homework: #107-132 due tomorrowtomorrow

Activities:Activities:

Ball rolling down ramp (measure Ball rolling down ramp (measure the length of the ramp)the length of the ramp)

Tennis ball drop (measure the Tennis ball drop (measure the height of the table)height of the table)

Walking pace (5.00 m) Walking pace (5.00 m)

Jogging pace (10.0 m)Jogging pace (10.0 m)

Your own activity that can be Your own activity that can be measured.measured.

Procedure:Procedure:

Do each of the five activities and Do each of the five activities and take five time trials for each one take five time trials for each one and record in the data table.and record in the data table.

Record all sig. figs. that are Record all sig. figs. that are given on the stopwatchgiven on the stopwatch

0:00.00 is 0:00.00 is

(min):(sec).(1/100 sec)(min):(sec).(1/100 sec)

Conversion ActivityConversion Activity(Day 2)(Day 2)

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BellworkBellwork

Where do you prefer to sit in this Where do you prefer to sit in this class?class?

After Data CollectionAfter Data Collection

Return to the desksReturn to the desks

Calculate average timeCalculate average time

Calculate average speedCalculate average speed

Convert the 10 Dominoes:Convert the 10 Dominoes:• 5 (total): m/s to km/hr5 (total): m/s to km/hr• 5 (total): km/hr to mile/hr5 (total): km/hr to mile/hr

Graph follow up questionsGraph follow up questions

Turn in activityTurn in activity

Graph:NOTE: This will be one of the only times

that we will use a bar graph.

In physics we will be using x-y plot graphs

Questions and Graph: (Answer in complete sentences.)Graph: Transfer the average speed (mile/hr) for the

activities to a bar graph.• In which activities was the average speed of the

object the fastest? In which activities was the average speed of the object the slowest?

• In which activities did the speed of the object stay the same over the distance traveled?

• In which activities did the speed of the object change over the distance traveled?

• What are three different Olympic events that use speed to determine the gold medalist?

• What two measurements are needed to find the average speed?