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$25.00
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Our greeting cards are 5" x 7" in size and are produced on digital offset printers using 100 lb. paper stock. Each card is coated with a UV protectant on the outside surface which produces a semi-gloss finish. The inside of each card has a matte white finish and can be customized with your own message up to 500 characters in length. Each card comes with a white envelope for mailing or gift giving.
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Von Eotvos's torsion scale. This device, designed to measure gravitational acceleration, was built and operated by the Hungarian physicist Lorand von... more
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2 - 3 business days
Average Rating (4.84 Stars):
Sandra Johnson
April 18th, 2024
I fell in love with this photo the day that Jan posted it. The cards are beautiful, frame able for a small space. I like that they have plenty of room for writing or doodling inside.
Cinder Rand
April 18th, 2024
This mermaid is a lovely gal and the colors are very zen and relaxing
Cinder Rand
April 18th, 2024
This card is fun. A lot going on but colors are lovely and brings joy
Cinder Rand
April 18th, 2024
A Diva indeed. What a happy card this is And I am a moon lover
Cinder Rand
April 18th, 2024
Sleeping on a dragon! My wish came true
Cinder Rand
April 18th, 2024
Love dragons this card was even better in person when it arrived.
Von Eotvos's torsion scale. This device, designed to measure gravitational acceleration, was built and operated by the Hungarian physicist Lorand von Eotvos (1848-1919). His 1889 experiment measured the differences in the gravitational acceleration of different masses. This difference was found to be effectively zero, showing that mass and inertia are equivalent. This is a central postulate of Einstein's 1915 theory of General Relativity. A torsion scale can measure tiny attractions between laboratory-scale masses, doing so by small changes in the torsion of twisted wires.
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All greeting cards ship from our production facility within 2 - 3 business days of your order.
$25.00
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