Compute how many days have elapsed since January 1, 1900.

19.1

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Compute what day of the week January 1, 2000 was.

19.2

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Find the date a hundred thousand days ago.

19.3

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Find the local time in Delhi.

19.4

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Find the length of daylight today by subtracting today’s sunrise from today’s sunset.

19.5

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Generate an icon for the current phase of the moon.

19.6

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Make a list of the numerical phase of the moon for each of the next 10 days.

19.7

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Generate a list of icons for the moon phases from today until 10 days from now.

19.8

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Compute the time today between sunrise in New York City and in London.

19.9

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Find the air temperature at the Eiffel Tower at noon yesterday.

19.10

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Plot the temperature at the Eiffel Tower over the past week.

19.11

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Find the difference in air temperatures between Los Angeles and New York City now.

19.12

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Plot the historical frequency of the word “groovy”.

19.13

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Compute how many weeks have elapsed since January 1, 1900.

x19.1

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Compute the time between 3 pm today and sunset today.

x19.2

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Generate an icon of the phase of the moon on August 29, 1959.

x19.3

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Make a line plot of the numerical phase of the moon for each of the next 30 days.

x19.4

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Make a Manipulate of the icon for the moon phase over the next 15 days.

x19.5

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Show in a column the times of sunrise for 10 days, starting today.

x19.6

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Plot together the historical frequencies of the words “science” and “technology”.

x19.7

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