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Mary Hetrick 1905 - 1976

Mary Hetrick of San Diego, San Diego County, California was born on August 10, 1905, and died at age 70 years old in July 1976.

Mary Hetrick

San Diego, San Diego County, California 92105

August 10, 1905

July 1976

Female

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Mary Hetrick Mary Hetrick (1905 - 1976)

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Mary Hetrick's History: 1905 - 1976

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08/10

1905

Birthday

August 10, 1905

Birthdate

Unknown

Birthplace

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07/dd

1976

Death

July 1976

Death date

Unknown
Cause of death

Unknown
Death location

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Mary Hetrick lived 3 years shorter than the average family member when died at the age of 70.

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Mary Hetrick lived 3 years shorter than the average family member when died at the age of 70.

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Did you know?

In 1905, in the year that Mary Hetrick was born, the German born physicist, Albert Einstein, proposed the Special Theory of Relativity: 1) that observers can never detect uniform motion except relative to other objects and that 2) unlike the velocity of massive objects, the speed of light is a constant and is the same for all observers independent of their constant velocity toward or away from the light source. Not such simple concepts that lead to the equation everyone now knows: E = mc2.

Did you know?

In 1914, by the time she was just 9 years old, in August, the world's first red and green traffic lights were installed at the corner of East 105th Street and Euclid Avenue in Cleveland Ohio. The electric traffic light had been invented by a policeman in Salt Lake City Utah in 1912.

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