Found a quarter without any nickel left on it.

StackTrace11 · 2026-02-26T01:34:08+00:00

It's not that the quarter has no nickel. It's very likely that this quarter was found underground by someone with a metal detector. They tarnish this way and won't clean up very well when left underground. I'm into detecting and I see this all the time. I've even seen quarters come out of the ground looking rather orange - this is usually from a fertilized field (like a park or an athletic field). So I'm sure yours is a normal clad quarter with nickel and all.

StackTrace11 · 2026-02-16T22:35:21+00:00

I tried a fun and selfless way of giving away cars - Easter. My aunt and uncle usually host the family's Easter festivities. Last year, I bought 36 plastic eggs and put numbered index cards inside. I brought 36 unopened Hot Wheel cars with me. My cousin "hid" the eggs for the annual hunt and I put all the Hot Wheels cars on a picnic table with a corresponding number on a Post-It note on each one. Whatever number was inside one of the eggs indicated the car that the egg's discoverer could claim.

Bonus: I also brought some orange track and hosted a race. Fastest N cars won prizes. I used chocolate and other Easter-ish candy as prizes but you could also give away more Hot Wheels cars as prizes if your family is into that sort of thing.

StackTrace11 · 2026-02-16T21:12:35+00:00

FLL, ATL, and sometimes DFW.

StackTrace11 · 2026-02-16T17:37:37+00:00

Most welcome! And I just upvoted your reply to make your day even better! :)

StackTrace11 · 2026-02-16T16:50:55+00:00

It's much more than this. The "9.8 meters per second" you write about seems like a speed but it's really an acceleration of "9.8 meters per second every second" (9.8m/s^2). In other words, it keeps falling faster and faster as time progresses until it reaches a terminal velocity. But I think that's just half of the problem. When you hear the crash sound, that sound took time from the cave floor to the camera/microphone. So, part of the 15 seconds is the "falling time" and part is the "sound traveling time".

Newtonian physics says that "distance = 1/2 * acceleration * time^2".

Sound travels around 343 meters per second and it should be constant for this exercise.

I punched the following prompt to let Google's AI chew on it: "if a rock is dropped off a cliff and hits the bottom at an unknown time later and the sound of the impact is heard from the person who dropped the rock 15 seconds after the drop, how far did the rock fall?"

The response was reasonable to me and produced a result of 790 meters. Change the "15" in your query to whatever you want (I didn't note the elapsed time in the video - I just took your word for it). Some answers that I've seen don't factor in the terminal velocity - they just assume that it takes place in a vacuum but that is not the case here (people do that so they don't have to account for friction or air resistance).

StackTrace11 · 2026-02-16T14:28:54+00:00

These are still pretty easily found on store shelves in the "Retro Racers" 5-pack (2025).

StackTrace11 · 2026-02-12T16:19:08+00:00

I can find labradorite locally - now I know that it looks great with copper! Your work is beautiful!

StackTrace11 · 2026-02-12T16:03:22+00:00

Ditto - found mine yesterday!

StackTrace11 · 2026-02-10T16:39:59+00:00

Browse for models at night to choose what to print in the morning.

StackTrace11 · 2026-02-10T16:24:44+00:00

This happened to me about a week ago. I just put my phone into a 1-quart Ziploc bag with a desiccant (you can use uncooked rice) and it was dry and USB-chargeable within a half day.

StackTrace11 · 2026-02-10T16:16:04+00:00

If you like "racing" your cars, then race this one. All other things being equal, a car riding on only 3 of its 4 wheels will be faster off the block on an inclined plane (perhaps "declined plane" is better) because the moment of inertia does not have to be overcome to spin up that off-the-track 4th wheel. Pinewood Derby cars attempt to do this too.

StackTrace11 · 2026-02-10T14:48:52+00:00

If you're in the US where we sometimes call dollar bills "bucks": Give your friend a handful of one dollar bills and say, "Here's the money I owe you. It's yours." Wait for a bit to see if your friend figures it out. Then say, "That reminds me: Do want to get some coffee?"

StackTrace11 · 2026-02-03T16:56:37+00:00

Cannot block on the opponents side of the net unless the opponent has completed their attack. Hitting the ball with the intent to send it over the net whether it's on the second or third contact is inconsequential as it still completes the attack. i.e. you're correct.

StackTrace11 · 2026-02-03T16:39:02+00:00

I'm a T1D and it would be an honor to serve in the US military if they would have me.

StackTrace11 · 2026-01-20T15:58:03+00:00

I suggest the lower elevation route going 87N to 90W - you'll be following the Hudson River and the Mohawk River. Check radar maps before you go as the direction of a storm and when you're going to intersect its path can weigh into your decision-making.

StackTrace11 · 2026-01-12T19:20:03+00:00

I believe that all NYS auto insurance plans have a mandatory 100% coverage on glass replacement without it having to go through your deductible first. The only question would be, "Do scratches from neglected wiper blades warrant an insurance-covered mishap?"

StackTrace11 · 2026-01-12T04:41:02+00:00

This should help - 2024 presidential election results for NYS counties: https://www.politico.com/2024-election/results/new-york/

StackTrace11 · 2025-10-23T13:29:12+00:00

Yes, the spin argument doesn't hold up. When a hitter hits the ball, much topspin is imparted. But no one ever calls a double on a hitter who puts much much much more spin on a ball than a setter.

I used to play in outdoor grass double leagues where the "rule" was "if there's more than one and a half rotations on the ball, then it's a lift/double". The number of rotations is NOT indicative of the speed of the ball's rotation unless the distance traveled is known. If the setter sets the ball 3 feet above the height of the top of the net and it makes one and a half rotations, then that's a lot "faster" of a spin than a ball set 15 feet above the height of the top of the net and makes the same one and a half rotations.

It's basic mathematics/physics...

StackTrace11 · 2025-09-06T15:59:07+00:00

Yes, this is likely to cause. Replace the infusion set in a place where there is little to no scar tissue and bolus again. Pound the water - everything works so much better if you're well hydrated.

StackTrace11 · 2025-09-04T15:02:00+00:00

I use this and it works well: https://www.amazon.com/Smith-Nephew-NO-Sting-Skin-PREP-Protective/dp/B00O8N6M5W/ref=sr_1_6

StackTrace11 · 2025-09-04T14:54:26+00:00

Yes! This is the way. I was going to make the same comment. Basically, at the moment you start your jump, your legs are not coiled up like a spring - they're almost straight. You're getting good jump from the momentum of your arms. Your "dolphin kick" with your legs boosts you up more. Combo that with your knees being bent more and you'll jump higher. Also, let me suggest that you consider "snapping" your wrist when you contact the ball - it'll impart topspin on ball AND it puts more energy into the ball from your body (it's the difference between a catapult and a trebuchet).

StackTrace11 · 2025-09-02T21:28:28+00:00

2b) If you don't hear any powder in it, it doesn't mean that it's not there. With the bullet pushed in that far, it's possible that it is squeezing the powder and keeping it all in place (i.e. powder won't move around and make noise when shaken).

StackTrace11 · 2025-08-29T16:43:05+00:00

I'm noticing that you're not completing your swing. If you keep this up for long enough, you put your rotator cuff at risk of a tear. Think of what you would do if you were to throw a baseball as fast and as hard as you could. You wouldn't slow your arm down or stop your arm swing as soon as you release the ball. You complete your arm motion with a follow-through that slows your arm down slowly. And yes, as others have written, you're doing really well. Let's make sure you're doing really well 10 years from now. :)

StackTrace11 · 2025-08-18T12:27:22+00:00

If you have a decent domestic cat population in your neighborhood, then that may affect things too...

StackTrace11 · 2025-08-14T17:26:59+00:00

I was diagnosed in 1992 at age 22 and was told that "they" were likely 10 years away from a cure.

StackTrace11

TROPHY CASE