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What speed are most vinyl records?
Vinyl records are produced to be played at one of three speeds: 33 1/3 RPM, 45 RPM, and 78 RPM. You will almost never deal with 78 RPM records, so don't worry about that. Most full-size 12-inch records will be 33 1/3 RPM, though some — mainly EPs and maxi-singles — will be at 45 RPM.

What does it mean to be designated for assignment?
Designate for assignment (DFA): A player is designated for assignment when he is removed from the 40-man roster to make room for a different player. Once a team DFAs a player, it has 10 days to trade him, release him or place him on waivers. If the player clears waivers, he can then be outrighted to the minor leagues.

How hot is the water in a shower?
The Department of Energy recommends having your tank-based hot water heater set to 120 degrees Fahrenheit for most people, but if you've never adjusted the temperature on your hot water heater, it's probably set to 140 degrees, which is the default setting from most manufacturers.

How many people have been to the surface of the moon?
Apollo astronauts who flew to the Moon without landing[edit] Twelve more people have been within a few hundred kilometers of the Moon. On each of the missions listed above one astronaut orbited the Moon while the other two landed.

Why does your hair turn white when you get older?
As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent color — like gray, silver, or white — as it grows.