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

 

     and express your answer in units of kg/m3?  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 0.13-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

 

     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 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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