Question

hello guys, can you give me at least 20 trivia related to physics. thank you very much.

Answer 1

The discovery of which two elements was kept secret during the Cold War? (Einsteinium and fermium, discovered in the Ivy Mike nuclear test in 1952 and kept officially secret until 1955.)

Answer 2

What is the only artificial element in the main Periodic Table? (Technetium, element 43, has no known stable isotopes. It is manufactured in nuclear reactors and used extensively in the preparation of isotopes used in nuclear medicine.)

Answer 3

To how many digits is the speed of light known? (Infinite. The speed of light is now defined to be exactly 299.792.485 m/s, and the meter is calculated from this value and the measured value of the second.)

Answer 4

When Anders Celsius originally defined his temperature scale, what were the melting and boiling temperatures of water? (100 and 0, respectively. His scale was reversed from the modern scale, so that *colder* temperatures were *higher* numbers.)

Answer 5

What color of light do green plants most use to drive photosynthesis? (Blue. They *reflect* (and do not use) green light, and that's why they're green.)

Answer 6

Where was the element helium first found? (On the Sun, through spectroscopy. It's name comes from the Greek word "helios," meaning "sun.")

Answer 7

Of what substance are white dwarf stars mostly made? (Iron. Iron is the end product of fusion reactions, the only element which cannot be fused or split to release energy.)