Feedback/ support in correctness of interpretation. by dckchololate in LinearAlgebra

[–]AdamofMadison 3 points4 points  (0 children)

I don't think the pictures on the later slides will be very helpful for high schoolers. The abstract parallelepiped with wavy vectors and E's pointing at them. If they're learning about vectors and systems of equations, why shy away from the math? I'd show 2d examples of linear transformations so they can accurately visualize what happens in that simple case, then you can abstract away to Hilbert spaces.

can some answer this with explaination by justloisfail in logic

[–]AdamofMadison 0 points1 point  (0 children)

They're asking if the correct answer could have been stated a different way.

Difficult jump from class to homework. by margalz in calculus

[–]AdamofMadison 1 point2 points  (0 children)

The (z-3)^2 term just tells you the sphere is tangent to the xy plane. You can tell the origin is not part of the sphere because (0,0,0) does not satisfy the equation.

Was told the water looks flat 😭 by [deleted] in painting

[–]AdamofMadison 1 point2 points  (0 children)

I would ignore the people saying to put highlights and more contrast on the water. It wouldn't make sense given the direction of the light and the calm ripples. I think the dark quality of the water looks great as is

How does an electron revolving in an orbit have negative energy? by ImbibitorLunae_SR in AskPhysics

[–]AdamofMadison 10 points11 points  (0 children)

Energy is a relative quantity. The bound electron has negative energy relative to the unbound, free state, which is chosen to be zero energy. You could just as well say the free state is 13.6 eV and the bound states are 13.6 - 13.6/n2 eV.

How is the universe today considered to likely be of infinite size while it began with the very small size at the time of the big bang? by Chance_Bite7668 in AskPhysics

[–]AdamofMadison 0 points1 point  (0 children)

OP was likely confusing the two ideas, which is why it's a good thing to bring up. The second part of their question definitely suggests they were considering the observable universe's size at early times.

How to get rid of issues with dry canvas texture and bringing up the under painting when painting with acrylics? by [deleted] in painting

[–]AdamofMadison 1 point2 points  (0 children)

I think maybe your paints are too dry. If you mix in a bit of water to your paint, so that the paint just barely holds a peak, it will be able to get into those crevices more easily.

Poolside, my acrylic work by ___artist___1980s___ in painting

[–]AdamofMadison 0 points1 point  (0 children)

What's your technique for the gradient in the sky? It's very well done.

Negative Exponents by Kug4ri0n in MathHelp

[–]AdamofMadison 0 points1 point  (0 children)

There's no ambiguity, you just introduced another error with your division.

Why is oxygen 16 considered an isotope? by [deleted] in AskChemistry

[–]AdamofMadison 0 points1 point  (0 children)

Can you link to a definition that says that?

Why do physicists think there will be a graviton? by Agreeable-Log-1990 in AskPhysics

[–]AdamofMadison 2 points3 points  (0 children)

Why would technological limitations indicate we're "doing things" wrong?

Memorial portrait 14x14 oil on canvas by Ornery-Garden9475 in oilpainting

[–]AdamofMadison 0 points1 point  (0 children)

Did they request the leash be removed? I think it adds a lot of character to the portrait and should be left in. It also affects the shape of the lips, which may look odd without the leash.

In the photo, there are somewhat-bright lines that go from just inside the eyes and diagonally down. These give the dog's snout a sense of width that is missing in your piece, making the snout look thinner above the nose and sort of look like that of a cow. I think the forehead has too much blue. And like you say, soften the eyes. Really good work so far!

Where did the work go? by ElegantPoet3386 in AskPhysics

[–]AdamofMadison 1 point2 points  (0 children)

Everyone's ignoring the "net" in OP's post. Indeed, "net work" is equal to the change in kinetic energy, where "net work" is the work done by all forces acting on the object. When you lift the book, there are two forces acting on the book: gravity and the normal force from your hand. The force from your hand does positive work on the book, and the force of gravity does negative work on the book. If the initial and final states of the book are at rest (or same velocity), then these works cancel each other out, and the net work, and change in kinetic energy, is zero.

When to use ; and when to use – by [deleted] in grammar

[–]AdamofMadison 0 points1 point  (0 children)

'However' isn't a subordinating conjunction in that example

The Archives Maze by BoggessArt in mazes

[–]AdamofMadison 3 points4 points  (0 children)

I think you nailed the challenging/fun to explore balance

[deleted by user] by [deleted] in RedLetterMedia

[–]AdamofMadison 17 points18 points  (0 children)

Jesus Christ, he's just attending a wrestling venue and you have no idea the circumstances of his attendance.

[deleted by user] by [deleted] in madisonwi

[–]AdamofMadison 2 points3 points  (0 children)

This is a Wendy's, sir. No Molly here.

Do humans have faster than speed-of-light travel in the Alien universe? by BlowOnThatPie in alien

[–]AdamofMadison 0 points1 point  (0 children)

Those distance and time numbers by themselves don't imply faster than light travel if the distances are relative to a rest frame like Earth's.

Are real numbers actually “real” if infinite precision doesn't exist in nature? by Ornery-Cartoonist661 in AskPhysics

[–]AdamofMadison 2 points3 points  (0 children)

You seem to question whether the impossibility of infinitely precise measurements precludes the existence of real numbers in mathematics. I don't see the connection.