projectil

“È molto bella l’immagine di un proiettile in corsa: è la metafora esatta del destino. Il proiettile corre e non sa se ammazzerà qualcuno o finirà nel nulla, ma intanto corre e nella sua corsa è già scritto se finirà a spappolare il cuore di un uomo o a scheggiare un muro qualunque.”

— Castelli di rabbia, Alessandro Baricco 

This is what happens when a carrot is fired at 300 km/hour at an egg, through two sheets of cardboard. 

This is what happens if you separate out the two sheets:

The egg survives! This shows how a Whipple shield works, and is what spacecraft use to protect themselves from micrometeoroid impacts in space. When the projectile (in this case a carrot, but in space it could be a speck of paint, a piece of an old satellite, or a bit of space rock) hits the first layer, it’s moving so fast that it starts to vaporise, because the energy of the collision is enough to break almost every bond in the substance.

It then sprays outwards, spreading the force of impact across a much wider area, meaning the second layer can stop it going any further, keeping your egg (or astronauts) safe.

Watch the full video on our YouTube channel.

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This high-speed video of a bullet fired into a water balloon shows how dramatically drag forces can affect an object. In general, drag is proportional to fluid density times an object’s velocity squared. This means that changes in velocity cause even larger changes in drag force. In this case, though, it’s not the bullet’s velocity that is its undoing. When the bullet penetrates the balloon, it transitions from moving through air to moving through water, which is 1000 times more dense. In an instant, the bullet’s drag increases by three orders of magnitude. The response is immediate: the bullet slows down so quickly that it lacks the energy to pierce the far side of the balloon. This is not the only neat fluid dynamics in the video, though. When the bullet enters the balloon, it drags air in its wake, creating an air-filled cavity in the balloon. The cavity seals near the entry point and quickly breaks up into smaller bubbles. Meanwhile, a unstable jet of water streams out of the balloon through the bullet hole, driven by hydrodynamic pressure and the constriction of the balloon. (Video credit: Keyence)

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play this at my funeral please

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Steven Universe Style + Comic + Colors practice.

Tried to get it as close to ‘screenshot’ level as possible. Some parts are just screenshots from “Catch and Release” since I was timing myself tonight. Went past my deadline :p

(This was actually a lame excuse to draw Peridot’s boot in exploded view, since we don’t know what’s inside it.)

Peridot has an affinity to lasers and cannons in the show. I bet she can combine her boot and tablet into a hybrid mega-buster / social media device. She can tweet and take selfies while attacking enemies >:3

Curious what her fusion with Pearl will be like, since Pearl has light-based projectile attacks. Opal has giant light arrows, a Pearl/Peridot fusion weapon might use something like this:

(Peridot is Tony Stark AND Magneto!)

If true, then it might lead to this:

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9.22.16 | 11:20 PM

I got my tests back in the past few days and in precal I got an A yay! and in physics I got an A+ double yay! I’ve begun to recognize my competition in precal (this one guy got 100% on the precal test–how?? ?)

today was more tiring not because of radical functions nor because of projectile motion, but just the flood of extroverts who were constantly in my company (life energy is quite drained at the moment)

I hope you have been putting in your best effort, and remember it’s okay to not be able to give your 100%, 100% of the time ♡

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I just took another shit.