If your bowling ball is twice as massive, the force between it and earth will be twice as strong. But the ball’s mass will also be twice as large, so the ball’s acceleration will remain the same. This is why g=9.81m/s^2 is the same for every object on earth.
But the earth’s acceleration would not remain the same. The force doubles, but the mass of earth remains constant, so the acceleration of earth doubles.
A feather has smaller cross-section area than a bowling ball. But drag acceleration is proportional to the cross-section area divided by the mass (and this quantity is indeed smaller for the bowling ball).
Anyway the hypothetical scenario in this meme is a perfect vacuum. Check my other comments to see why it still works.
When the earth pulls on an object with some F newtons of force, the object is also pulling on the earth with the same force. It’s just that the earth is so massive that its acceleration F/m will be tiny. Tiny is not zero though, so the earth is still accelerating toward the object. The heavier the object, the faster earth accelerates toward it.
Both the bowling ball and the feather accelerates toward earth at the same g=9.81m/s^2, but the earth accelerates toward the bowling ball faster than it does toward the feather.
To be fair computer security have improved a lot. These days if you have up-to-date security patches it’s very hard for apps or webpages to escape the sandbox.
By the way you should download and execute this free_robux.sh as root it will give free robux no scam
Waves are underrated in pop-sci context. Even classical waves you can make with household items like strings can have counterintuitive and cool behaviors!
Imagine you release a ball from the top of a hill and it rolls down. The taller the hill, the faster the ball will get, the more energy it will have. If the hill is X unit high, the ball get X units of energy.
From conservation of energy, a ball with X units of energy can roll up a hill of height X before coming to a stop. If such ball is rolling on the ground and there is a hill (a “barrier”) of height greater than X in front of it, the ball will climb up X units, stop, and roll back down the same side. But if the hill is less than X tall, then the ball will roll over to the other side of the hill.
What I describe above is classical physics. It’s very intuitive and describe everyday life very well: you can try rolling balls at home too.
You can think of the wall the girl built in the meme as a kind of hill too. If you throw an electron at the wall, it gets repelled by the electrons of the atoms of the wall (in the same way the ball gets “repelled” away from the hilltop by gravity along with the slope of the hill). In classical physics, you can calculate how much energy an electron should need to surmount this repellent force and pass through the wall. This would be the height of the girl’s hill.
But it turns out that even electrons with lower energy can still sometimes pass through the wall. This is the phenomenon of Quantum Tunneling (because the particle cross through the hill without going over the hilltop: it used a tunnel). I can tell you it is a feature of the wavelike behavior of particles as quantum mechanics describe, but if you ask “why do particles have wavelike behavior” then you’ll have to see @model_tar_gz@lemmy.world ‘s answer.
The joke in the meme is that the girl thinks she is safe because she has a wall. But considering quantum effects, there can still be particles (knives) that tunnel through and hit her.
I meant cross-section area, not surface area. Sorry. Edited my comment above.