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 endtoend 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 sideby
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 m^{3}. 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 (4πR^{3})/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
and express your answer in units of kg/m^{3}? Show your work.
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 0.13mm. 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 endtoend in a straight
line, how much money is the EarthMoon 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
your reasons for your choice.
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 cm^{2} and m^{2}? 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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