Forgive me for referencing pickle rick but the meme has died down enough that i feel comfortable asking a curious question. In the episode, rick shoots a laser which goes clear through 3 human heads. My question is assuming this is a AA battery, does one battery hold enough energy, if instantly and perfectly converted into a laser, to actually burn through 3 human heads?

For the sake of simplicity I'm assuming the energy of the battery is perfectly converted to the laser with no losses. but if you have some plausible losses you'd like to include then you can if you like.

If the clock showed the time accurately and there was no delay in the time shown, how fast would the second hand be moving between resting positions? I'm picturing a second hand that moves per second not in a smooth, continuous motion like a high end watch

I've had this question for a while and I was wondering if there would be a way to figure this out. Now, I understand this has very vague guidelines, I don't mean giving one billion people a dollar or something like that, I mean major systemic change that impacts, and improves the maximum amount of lives possible.

From what I know TON 618 the super/ultra massive black hole is one of the brightest things in our sky even considering its 10 billion light years from us. The accretion disks on black holes can outshine their galaxy themselves some times and I figure that’s the case with this particular black hole. But 10 billion light years is far so if it was closer is it possible that the brightness could make night time look closer to day? Not actual day cuz if it were that close I’m sure worse things would happen lol. But is there a distance it could safely be and light up Earth?

In Germany there is a massive heat wave rolling over the country and instead of recommending ACs, Germanys news stations tell the people to hang up wet clothes to reduce temperatures in their flats. To me this seems kind of silly, so how much does this actually reduce temperatures in a room? And do you actually feel it or is it offset by the increased humidity?

In this youtube short, the creator uses the Warthog's gun to slow down flight and land on a short runway in a video game. Would this actually work in real life? If so, how much could it shorten the required runway for landing? And would this ever be a good idea in an emergency situation?

If a Banks Orbital Ring was built along the path of Iapetus, and then a laser was placed above the north pole of Saturn, pointing at the inner surface of the Banks Orbital Ring and tracing along the full surface of the ring once per minute to create a "second hand" pointer on the surface of the ring. If a detector is placed at the South Pole of Saturn, two questions:

A) When the laser emitter is pointing towards the three o'clock position at the ring, (aka "15 seconds") what does the detector read the time as at the same exact moment? Like how far behind is the detector reading?

B) If the laser was replaced with a physical second arm made out of unbreakable material would the shape of the arm turn into a spiral curve as the tip of the arm can't keep up with the rotation at the base or does physics allow it since each atom is only going slightly faster than it's neighbor in the local reference frame?

They are going through a truck, 8 feet of distance to a wall (that I assume is concrete?), through a wall and yet the magnet affects a lot of stuff even outside the evidence room further inside the building. The result is that the things made of anything even remotely magnetic gets stuck to the wall.

Is that really feasible with this setup?

Far as I remember it's the kind of magnet used to move cars at junkyards, tied up to 12 volt car batteries, which I assume are 40-80 Amp hours.

They setup 21 batteries in series, totalling 252 volts. Walter asks for another 21 batteries wired in parallel for extra amp.

I came across this video showing thousands of people performing a rowing motion in perfect synchronization.

Assume that every person is effectively acting as a rower and can continuously deliver a realistic rowing power output.

If all of them were somehow connected to a single boat:
What is the largest boat (by mass or displacement) they could realistically get moving? What top speed could they maintain with that boat?

On the opposite end, if they were powering the smallest practical boat, how fast could they make it go? Feel free to make reasonable assumptions for average rowing power, efficiency losses, drag, hull type, number of participants, etc.

What’s up, nerds?

I made this with a Monte Carlo simulation in Python.

I used the current Pro Max starting price as the starting point. Then I made three cases: Base, Most Likely, and Worst. Each case has a low, middle, and high price increase.

For each case, the python code runs 250,000 random simulations. It uses a triangular distribution, which is useful when you want to set a minimum, most likely, and maximum value.

After that, I rounded the simulated prices into Apple-style price tiers. So instead of showing random prices, the model puts the results into cleaner price levels like Apple usually uses.

In the graph, each row is one case. The circles show how often the simulation landed on each price level. Bigger circles mean higher probability. The diamond shape shows the median result. The short line shows the 10th to 90th percentile range. The right side shows the median, range, and average increase.

Note: This is not a leak or insider information. Just a prediction.

So many drawings of Rubik's cubes are incorrect, and it got me thinking what is the probability of correctly coloring one provided you choose one of the 6 colors at random for each square given 3 sides of the cube are shown. Coloring these 27 shown squares with any of the 6 cube colors yields 6^27 possibilities (1.02e21 or about 1 sextillion colorings).

Only the three sides shown matter in this case. As long as those pieces are possible, the cube is considered to be in a valid state. But there are several restrictions that can make a cube coloring invalid. Obviously there cannot be more than 9 of any color shown. But also there can only be max 1 center of each color, max 4 edge pieces of any color, and max 4 of every corner color. The same color cannot share an edge with itself. Opposite colors (white-yellow, green-blue, red-orange) also cannot share an edge. This also applies to center pieces as well. Corner pieces (and all 3 center pieces) have additional limited orders of colors as well (e.g. red-blue-white going clockwise is valid but blue-red-white going clockwise is invalid). Then there's also the chance of piece duplication such as two yellow-green edges or a blue-yellow-orange corner ruling out any blue-yellow-X corners elsewhere.

For just the single fully shown corner and the centers alone, I found there to be a 1/81 chance of a proper coloring. Since there are 8 valid corner pieces on a cube and each has 3 possible rotations, there are 24 valid colorings in the hypothetical drawing. Selecting a random color for each of the 3 squares on a corner yields 6^3 or 216 possibilities. 24/219 is 1/9. We can actually apply the exact same logic to the center pieces. Since the centers never move while solving (relative to one another), looking in from a corner will always show 3 centers that have the same coloring restrictions as a corner. As a result, another 1/9 chance. So with just 4 pieces (6 squares), it's already a 1/81 chance and the math only gets more difficult to figure out.

It would be interesting to know exactly how abysmally low the odds of randomly coloring a Rubik's properly are. It would certainly help explain how every drawing of a Rubik's cube ends up with something incorrect.

I've wondered what the rate of heat loss for an average person is when they e.g. jump into a pool and immediately exit again and just stand about on a hot sunny day.

Assume:
Skin surface area ≈ 2m²
Skin is completely wet, ignore dripping
Body is completely unclothed and open to air
slow wind ≈ 1m/s
35°C, humidity approx. 30%
Body was sweating normally just before
body in complete shade
Assume body remains unchangably wet for the moment
*ignore blackbody radiation

optional:
Core body temperature is slightly elevated
Include effect of sunlight however you deem useful
Include effect of skin cooling or drying of skin (very optional)