# Project #39474 - Lab Exercise #1

PHSC 1411 ONLINE

LABORATORY EXERCISE #1

MEASUREMENTS, SIGNIFICANT FIGURES AND CONVERSIONS

Instructions: Please answer the following questions by performing the necessary measurements and subsequent calculations or simply performing the calculations asked for in the question.  It is important that you SHOW YOUR WORK as partial credit will be given.  Please answer the questions by typing the answers and your work in Microsoft Word format and emailing the exercise to me via my University email at rfkouri@ollusa.edu.  I will not accept handwritten, scanned JPEG files.  You may need to use the Internet for certain formulas.  The assignment will not be accepted after the due date.

Due Date:  September 9, 2014

1. Find a #2 unsharpened pencil and measure its length in centimeters (cm).  How many

pencils put end-to-end in a straight line does it take to make a distance of one km?

Now measure the diameter of the pencil in mm.  How many pencils stacked side-by-

side touching each other in 100 yds (1 yd = 3;0 ft)?  Express your answers as whole

numbers.

2.  Get a tennis ball and wrap a sring around its circumference once.  Measure he length

of the string and from the definition of circumference, determine the radius of the

tennis ball in cm.  Once you have calculated the radius, calculate the volume of te

tennis ball in m3.  How many tennis balls would it take to equal the volume of a

sphere 1000 km in diameter.  Express your answer as a whole number.  The volume

of a sphere is (4πR3)/4.

3.  Currently the national debt is \$18 trillion.  If it were paid back at \$5000/second, how

many years and days would it take to pay it off?

4.  Using data from the Internet, which planet has the least density, Mars or Saturn?

The density of an object is its mass divided by its volume.  Treat the planets as spheres

5.  Complete the table by entering the number of significant figures in each number and

then writing the number in scientific notation.

 Number Significant Figures Scientific notation 0.006 43.0198 0.0000006095 940,000. 211,100 8 x 10-2 0.150 64,500 1.3400 0.550,000,000,000

6.  A dollar bill has a thickness of 0.13-mm.  If the dollar bills are stacked on top of each

other, how tall, in feet, is one thousand dollars?  Now measue he length of a crisp

dollar bill in mm.  If dollar bills are pt lengthwise, ouching end-to-end in a straight

line, how much money is the Earth-Moon distance.  The average distance between the

warth and Moon is 384,000 km.

7.  A wealthy entrepreneur hires you for 30 days to invent and build a time machine.  It

will require both technical and manual skills.  She gives you two options to be paid.

Option 1 is a lump sum of \$7 million at the end of the 30 days.  Option 2 is to be paid

one cent the first day, two cents the second day and every subsequent day your daily

wage doubles.  Which option would you choose to make the most money?  Explain

8.  An eccentric millionaire tells you he will give you one million dollars if you can count

it out in \$1 and you must finish the counting in 10 days.  Should you accept the

wager?  Assume your counting rate is \$1/second and you can count for 24 hours/day.

9.  Tell me the brand of your Smart Phone.  If you do not own one, tell me the brand of a

family member of friend that owns one.  What is the surface area (length times

width) in cm2 and m2?  Express your answer to three significant figures.

10. Tell me your height in feet and inches.  Now, take 20 sheet of computer printer paper

and measure its thickness.  Determine the thickness of a single sheet from your

measurement.  Using this number, how many sheets of paper will it take to make

your height if the sheets are stacked on top of each other?

 Subject Science Due By (Pacific Time) 09/09/2014 12:00 am
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