Scientific Notation

It is: 5.8*10^-1

There is no simple answer to this question because eggs are not spherical but ellipsoids (3 dimensional ellipses). There is, therefore, no direct link between the diameter and length.

If it were spherical, the length would have been 1.2*10^2 mm.

It is: 6.23*10^-1

Biologists use scientific notation to compute very large or very small numbers.

8.11 × 10-3 meters.

It is: 6.5*101

5x105

Note that 251 is the same as 251.0. Move 2 decimal places to the left to get:

2.51 x 102

1.023 * 10-4

= 8.563 x 1/103

= 8.563 x 1/1000

= 0.008563

It is: 1.8*10^6

It is: 9.5*10^-4

2.5 × 10-7

Scientific notation provides a compact and clear way to express very large and very small numbers.

The Urban Dictionary lists a game called cupit, but it's not very scientific. I'm guessing you meant "cubit" which is an ancient measure of length, approximately equal to the length of a forearm. It was typically about 18 inches or 44 cm, though there was a long cubit of about 21 inches or 52 cm.

80 billion in scientific notation is: 8.000000e+10

I am having extreme problems(i think logic) trying to convert 24 hour time notation to 12 hour time notation with AM and PM. I really don't have an idea of what the problem is. The user inputs a string time in 24 hour notation, and then the program is supposed to convert it, not using any java tools.

01public class TimeConvert

02{

03

04//int value of hour

05private String hour;

06

07//int value of minuets

08private String minuets;

09

10public TimeConvert()

11{

12hour="00";

13minuets="00";

14}

15

16//static method to convert a 24 hour time to 12 hour time

17public String doConversion(String aTime) throws TimeFormatException

18{

19//formatted String

20String timeFormated = String.format("That is the same as %s:%s",hour,minuets);

21

22//find the position of the colon

23int colon=aTime.indexOf(':');

24

25//if there is no colon

26if(colon!=2)

27{

28TimeFormatException tfe= new TimeFormatException("You entered "+aTime+"\nFormat must be hh:mm\n");

29throw tfe;

30}

31

32else

33{

34//parse the numbers before the colon

35hour = aTime.substring(0,colon);

36int intHour=0;

37

38//parse the numbers after the colon

39minuets = aTime.substring(3);

40int intMinuets=0;

41

42try

43{

44intHour= Integer.parseInt(hour);

45intMinuets= Integer.parseInt(minutes);

46

47if(intHour <0 intHour>23)

48{

49throw new TimeFormatException("\nYou entered "+hour+"\nHour must be less than 23\n");

50}

51else if(intMinuets<0 intMinuets>59)

52{

53throw new TimeFormatException("\nYou entered "+minuets+"\nMinuets must be less than 59\n");

54}

55

56else

57{

58if(intHour==12)

59{

60minuets+="PM";

61}

62

63else if(intHour<12)

64{

65minuets+="AM";

66}

67

68else if(intHour>12)

69{

70intHour=intHour-12;

71hour=Integer.toString(intHour);

72minuets+="PM";

73}

74}

75}

76

77catch(NumberFormatException nfe)

78{

79TimeFormatException tfe = new TimeFormatException("\nYou entered "+aTime+"\nFormat to hh:mm\n");

80throw tfe;

81}

82

83}

84return timeFormated;

85}

86}

Here is the custom exception class

01class TimeFormatException extends Exception

02{

03//one String parameter constructor to pass to super class Exception

04TimeFormatException(String msg)

05{

06super(msg);

07}

08

09//concatenate 2 String messages and pass to super class Exception

10TimeFormatException(String msg,String msg1)

11{

12super(msg1+msg);

13}

14}

And here is the test class to run the program.

01import java.util.*;

02public class TimeConvertTest

03{

04public static void main(String args[])

05{

06//instantiate Scanner

07Scanner scan=new Scanner(System.in);

08

09//instantiate TimeConvert object

10TimeConvert convert = new TimeConvert();

11

12while(true)

13{

14System.out.print("\nEnter Time in 24-hour notation<hh:mm>: ");

15

16String converted="unknown";

17

18//try to convert the time

19try

20{

21//ask user for a time

22String aTime=scan.next();

23converted=convert.doConversion(aTime);

24}

25

26catch(TimeFormatException tfe)

27{

28System.out.println(tfe.getMessage());

29}

30

31System.out.printf("%s\nAgain(y/n)",converted);

32String desc = scan.next();

33char opt = desc.charAt(0);

34switch(opt)

35{

36case'n':

37System.exit(0);

38break;

39

40case'y':

41break;

42}

43}

44

45}46}

0.002001 in Scientific Notation = 2.001e-3

fail

2,450 * 103.

7.6 x 10^3

0.000213 in scientific notation is 2.13 x 10-4.

Scientific notation is a way of representing numbers, usually very large or very small, in the form a*10^b where 1 ≤ |a| < 10 is a decimal number and b is an integer (negative or positive). a is called the mantissa and b is called the exponent.

28.7 in scientific notation = 2.87 x 10-1