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Time Difference and Longitudes>
Time Difference and Longitudes 2Time Difference and Longitudes 2
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Question 1 of 5
1. Question
Find the time difference between Tokyo and Sydney given the following:Tokyo `(35°N,139°E)`Sydney `(34°S,151°E)`- (48) minutes
Hint
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The prime meridian is a line of longitude at `0°`On the opposite side of the prime meridian lies the `180°` meridian.Finding the Time Difference
`1°` of longitude to the west `=` subtract 4 minutes (West = lest)`1°` of longitude to the east `=` add 4 minutes (East = beast)First, draw a rectangle with the Prime Meridian and the two longitudesSince both longitudes are to the east, draw the line for the Prime Meridian first
The prime meridian is also called Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC)Draw a line that connects the two longitudes
This line represents a minus sign, which means we must get the difference between the two longitudes`151°-139°` `=` `12°` Finally, solve for the time difference by multiplying `4``12°``xx4` `=` `48` minutes Hence, the time difference between Tokyo and Sydney is `48` minutes.`48` minutes -
Question 2 of 5
2. Question
Find the time difference between Vienna and Adelaide given the following:Vienna `(48°N,16°E)`Adelaide `(35°S,139°E)`- (8) hours (12) minutes
Hint
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The prime meridian is a line of longitude at `0°`On the opposite side of the prime meridian lies the `180°` meridian.Finding the Time Difference
`1°` of longitude to the west `=` subtract 4 minutes (West = lest)`1°` of longitude to the east `=` add 4 minutes (East = beast)First, draw a rectangle with the Prime Meridian and the two longitudesSince both longitudes are to the east, draw the line for the Prime Meridian first
The prime meridian is also called Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC)Draw a line that connects the two longitudes
This line represents a minus sign, which means we must get the difference between the two longitudes`139°-16°` `=` `123°` Finally, solve for the time difference by multiplying `4``123°``xx4` `=` `492` minutes `=` `8` hours `12` minutes Hence, the time difference between Vienna and Adelaide is `8` hours `12` minutes`8` hours `12` minutes -
Question 3 of 5
3. Question
Find the time difference between Paris and Detroit given the following:Paris `(49°N,2°E)`Detroit `(42°N,83°W)`- (5) hours (40) minutes
Hint
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Correct!
Incorrect
The prime meridian is a line of longitude at `0°`On the opposite side of the prime meridian lies the `180°` meridian.Finding the Time Difference
`1°` of longitude to the west `=` subtract 4 minutes (West = lest)`1°` of longitude to the east `=` add 4 minutes (East = beast)First, draw a rectangle with the Prime Meridian and the two longitudesSince one longitude is the west and the other is to the east, the Prime Meridian should be in the middle
The prime meridian is also called Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC)Draw a line that connects the two longitudes
This represents a plus sign, which means we must get the sum of the two longitudes`83°+2°` `=` `85°` Finally, solve for the time difference by multiplying `4``85°``xx4` `=` `340` minutes `=` `5` hours `40` minutes Hence, the time difference between Paris and Detroit is `5` hours `40` minutes.`5` hours `40` minutes -
Question 4 of 5
4. Question
Find the local time in Athens given the following:Athens `(38°N,24°E)`Greenwich `12`pmHint
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The prime meridian is a line of longitude at `0°`On the opposite side of the prime meridian lies the `180°` meridian.Finding the Time Difference
`1°` of longitude to the west `=` subtract 4 minutes (West = lest)`1°` of longitude to the east `=` add 4 minutes (East = beast)First, draw a rectangle with the Greenwich (Prime Meridian) and Athens’ longitudeRemember that Greenwich is at `0°` longitude
The Greenwich is also called Coordinated Universal Time (UTC)Draw a line that connects the two longitudes
This line represents a minus sign, which means we must get the difference between the two longitudes`24°-0°` `=` `24°` Next, solve for the minute difference by multiplying `4``24°``xx4` `=` `96` minutes Since Athens is to the east of Greenwich, add `96` minutes to `12`pm`12`pm `+96` minutes `=` `12`pm `+1` hour `36` minutes Divide minutes by `60` to convert to hours `=` `1:36`pm The time in Athens is `1:36`pm`1:36`pm -
Question 5 of 5
5. Question
Find the local time in San Diego given the following:San Diego `(32°N,117°W)`Cairo `(30°N,31°E) 3`am SundayHint
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Incorrect
The prime meridian is a line of longitude at `0°`On the opposite side of the prime meridian lies the `180°` meridian.Finding the Time Difference
`1°` of longitude to the west `=` subtract 4 minutes (West = lest)`1°` of longitude to the east `=` add 4 minutes (East = beast)First, draw a rectangle with the Prime Meridian and two longitudesSince one longitude is the west and the other is to the east, the Prime Meridian should be in the middle
The prime meridian is also called Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC)Draw a line that connects the two longitudesThis represents a plus sign, which means we must get the sum of the two longitudes
`117°+31°` `=` `148°` Next, solve for the minute difference by multiplying `4``148°``xx4` `=` `592` minutes Since San Diego is to the west of Cairo, subtract `592` minutes to `3`am`3`am `-592` minutes `=` `3`am `-9` hours `52` minutes Divide minutes by `60` to convert to hours `=` `03°00°-09°52°` press the DMS button on the calculator for every `°` `=` `-6°52’` Since the answer is negative, it means the time we are looking for occurs the day before which is SaturdaySimply add `24` hours to convert it to military time`-6°52’+24°` `=` `17°08’` `=` `1708` hours The time is in pm or in the afternoon since it is greater than `12`.Subtract `12` hours to get a proper time format`1708` hours `-12` hours `=` `05:08`pm The time in San Diego is `05:08`pm Saturday`05:08`pm Saturday
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- Add Units of Time
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- Convert 12 Hour Time to 24 Hour Time 3
- Convert 24 Hour Time to 12 Hour Time 1
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- Add and Subtract Time Using the Calculator
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