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How long do circle eye lenses last?
My friend got them in Circle Long June 2009 and she wants to know if she can still wear them. She's worried it might be damaging to her in any way.
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Time = distance /speed = 2*pi*R/v = 2*pi*3000/190 = 99.2s
not accurately
I prefer cucumbers being cut in circles, at least for salads.And wat abt u????R u gonna decide dat after we all answer?…..lolz
The true maximum speed of the F-22 is unknown to the public but it is estimated at mach 2.25 or about 1,500 mph. Now the circumference of the earth is 25,000 miles (at the equator) so it can be determined that flying nonstop at full speed it could circle the Earth in about 17 hours, but this isn’t possible due to the limited fuel supply on board, which gives the aircraft a range of about 1800 miles before refueling is needed. Now with the information we can determine the aircraft will need to do an in-flight refuel about 14 times to make the trip, if you estimate that each rendezvous with the refueling plane will take about 30 minutes, this adds another 7 hours to the equation. So conservatively you can estimate it would take the aircraft anywhere from 24-32 hours to circumnavigate the Earth……approximately.
6 – 8 hours should be the max. I don’t suggest wearing circle lenses every day though, seeing how aren’t very good for your eyes. I honestly know from personal experience. I had three blood vessels pop from wearing them too much, so when people say to only wear them for a maximum amount of time, they’re usually right >.
this is a trick question because you say it is swung at a constant speed, but you did not say what that speed was so it depends on how fast it is moving.
A day lasts 24 hours everywhere. Did you intend to ask how long daylight lasts? If so, the answer is a different length every day. On Dec. 21,, it lasts 0 hours; on June 21 it lasts 24 hours; On Sept.21 and Mar 21, it lasts 12 hours.
Probably 2-3 years or more. Vial lenses are good for a long long time before opening.There is no expiry date on the vial ?
The radius of the octagon is 27.5 mm. The angle between a radius and an adjacent apothem is 360/16 = 22.5 degrees.So, if x = half the length of a side of the octagon, thensin(22.5) = x/27.5, sox = 27.5 * sin(22.5)x = approx 10.52 mmAnd the side length is just over 21 mm.I hope this helps!ericlord:You are mistaken. The circle has a circumference of 55*pi = approx 172.79 mm. The perimeter of the octagon inscribed inside it must be smaller than the circumference. This means that the side lengths must be less than 172.79 / 8 = approx 21.6 mm. So your answer of 22.78 mm is too large to fit.Your mistake is saying that tan(22.5) = B/2R. It should be that tan(22.5) = B/2A, where A is the apothem. However, since we don’t yet know the length of the apothem, this is useless to us. So, instead, you should use sin(22.5) = B/2R, which is essentially what I did.
First a correction. Mothra was a she not a he. Something about the ability to lay eggs makes me guess that one. -In the original 1961 version she was able to fly at Mach 3 (1,020.87 m/s)In the 1992 version she was flying at Mach 2 (680.58 m/s).The mean circumference of the Earth is 40,041.47 km.At Mach 3 that would be 10:53:43 In hours/minutes/seconds.At Mach 2 that would be 16:20:35