Sunday, September 29, 2013

Physics of Superheroes Question

Post your question about the reading in the response.

56 comments:

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  2. What is the difference between density, mass, and weight?

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    1. The difference between density, mass and weight is that density has to do with compactness or "The quantity of something per unit measure" (Dictionary.com), mass had to do with all the atoms that make you or something up and weight is directly correlated to negative force.

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    2. The difference is that density is the amount of mass inside an object. "Weight is the force of gravity on the object" (http://hyperphysics.phy-astr.gsu.edu/hbase/mass.html)and mass is how much matter an object has.

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  3. Would only Gwen Stacey's neck break when Spiderman stopped her fall, or would most of the bones in her body break?

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    1. I believe that only the bones that came into contact with the Flash would break, however, the other bones would be dislocated as they are being pulled behind her body at such high speed.

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    2. Most of her bones would break because, although the neck is the most vulnerable bone, the speed at which Gwen Stacy decelerates would be really harmful.

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    3. I believe only Gwen Stacey's neck would break because the rest of the body has come in contact with the web, causing it to avoid the sudden snap. When Gwen was stopped suddenly by the web, her neck was hanging off and it snaps backward, causing it to break. Because the rest of her body isn't put under that force, those bones wouldn't break.

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    4. I believe that just her neck would break. Since the web surrounded and stopped the majority of her body besides her neck, he neck still was "falling" in a way. If her body is stopped but her neck isn't, the force of the fall is definitely going to break her neck.

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    5. I believe that her neck would be the only bone to break, while others may fracture, because spiderman caught her by her ankle most of the pull would be on her hip, she would possibly dislocate or fracture her hip bone from the force of suddenly stopping while falling at a great speed.

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  4. Why are Pascals important to the myth/

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  5. How can a gas planet, which Krypton is (as said by Ms. Sertis during discussion), then how could it have 15 times the gravity of earth?

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    1. Gas planets have a core that provides gravitational pull to the gasses surrounding it. Similar to our sun they have layers of gas that envelope their cores.

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    2. The reason that Kakalios believed that Krypton was so much denser than Earth was due to the fact that there must have been neutron-star material at the core of that planet. Neutron star material, and it is really the only substance that could make the gravitational pull of Krypton 15 times greater than Earth's.

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    3. Well, Krypton is only a gas at the atomical measure of temperature (75 Degrees Fahrenheit) which doesn't state that it is always a gas. It could be really cold on Krypton and therefore the atoms move less and are more stable. Now, Krypton is a 100% stable element (all noble gases are) and cannot obtain a shape very well even under extreme circumstances. The planet could also be under extreme pressure and be very cold, making a solid planet a practical guarantee. If somehow it was a liquid or a gas planet, that could explain the extremely strong muscles that superman has. Being that he is a different species, he could have lived where over time some sort of gliding wings grew onto you, or if it was a liquid planet fins, and the way that he would have developed could have changed on Earth. His heritage could have been partially saved, bringing what is on Earth, and also have partially been lost. The new question is after this thought: How would superman survive if his species were used to freezing temperatures or extreme air pressure? How would his powers be retained? How would he be different? (Paleness (due to temp. diff.), growth differences, size, etc.)

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  6. Is there a speed that can not be passed on earth due to air resistance?

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    1. Technically there is a speed that could not be passed because of air resistance but really the faster you go the less air resistance will affect you. It's like how with numbers they theoretically go on forever it's the same with hypothetical speed. As long as there it air restance it will slow it down, granted it may only slow it down by 0.000000000000000000000000(going on forever)000001 kph.

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  7. How does the density of a planet affect it's gravity?

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    1. The density of a planet affects its gravity because the more mass an object has the stronger gravity it has. A smaller more dense planet may have more gravity then a larger gas planet due to the different masses.

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    2. The density is in direct correlation with the mass in a given area, so amount of atoms/ cubic meter would be describing the density of an object. Gravity has no correlation to density though, even when it comes down to the length of the gravitational field, as any planet with a mass of 100,000 N no matter the density will have the same negative pull to your pushing away.

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  8. If Flash I said to move at such a great speed that he can overcome gravity, then why doesn't he have the power of flight?

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  9. Why doesn't flash, running at his top speed, leave the Earths gravity and fling out into an Earth orbit?

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    1. I'm assuming you mean atmosphere. Gravity is in effect anywhere on Earth, so you can't fling out of gravity. And, there is a potential top speed, or else the Flash wouldn't be able to control himself. Even if it was possible for him to go fast enough to fly toward the atmosphere, he'd burn up almost immediately in attempt to leave.

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  10. If the Flash has to move above the speed of sound, then wouldn't the air pressure and the small particulates in the air kill him because of the force emitted on his skin? Also, how would his lungs be strong enough to draw in a breath, to avoid suffocation?

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  11. If the flash is moving at super sonic speeds wouldn't the friction physically harm him?

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    1. Yes, because friction causes heat. The friction should disintegrate his body as well as cuts and bruises from particles hitting his face at high speeds.

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  12. If the Flash, at full speed, runs on a big enough rug to create a lot of positive electricity and then touches someone what would happen when the electricity transfers into that person?

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    1. The Flash would most likely transfer most of the electrical energy into that person and harm, kill, or disintegrate them.

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  13. What is one way Peter Parker could have saved his girlfriend Gwen without killing her?

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    1. If he was at the same speed as Gwen, he somehow brought her to a gradual halt as apposed to a sudden stop or he grabbed her before she speedup tho that speed, she would probably have survived the fall as the inertia would not cause her neck to snap due to the sudden change in speed.

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    2. He could have slowly stopped her using his webbing at an angle, like how he swings, to propel her in a direction and lose downward force at an almost lethal rate. If the diameter of the swing was larger then the chances of survival would rise due to the longer length of time in the slowing down. He would have to move out of the way and get a distance away from Gwen first, though, and see her in time while shooting his web in order to save her which would be another impossibility. If he had that much time to do that he probably could have just saved her as she fell off of the edge.

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  14. Is the reason that ice stops fast movement because it causes more friction with the object or less friction? Why?

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    1. The reason Ice stops fast movement is because it is causing less friction. Without friction you can move your legs as fast as you want but, you can't get anywhere. If you have no friction you can't push forward off the ground.

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  15. If flash ran around a villan, wouldn't it suck the air out and suffocate the victim?

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  16. If the Flash can travel faster than the speed of sound, how long would it take him to come to a complete stop.

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  17. Is there a possible way to have saved Gwen without snapping any bones? How?

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    2. I don't think Spiderman could have because anyway he could grab her led to death, such as grabbing her shirt, her shirt would rip and she would fall to her death. Also if he grabbed her he would have to much force coming at her which would result in her bones crushing.

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    3. I do think that Spiderman could have because like we saw later when he was catching the window washer, it is possible to save someone without them breaking any bones. He would just have to match velocities and absorb the stop with his spider-strength and not let too much get to Gwen.

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  18. Wouldn't breathing be difficult for the flash when moving at such high speeds?

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    1. Interesting question. Consider fighter jet pilots; they need oxygen tanks to fly in their Raptors and Blackbirds and whatnot, so taking that into consideration, the Flash would constantly need to carry a heavy oxygen tank on him (thereby partially defeating his power) to be able to run at such incredible speeds.

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    2. It is possible that he is just acting proportionate to his environment; he is like a fly, flies move like we do, but they move over 50x their length in distance per second. Picture a human doing that. That is how the flash could work and he feels like is breathing at normal speed. Basically, it is the world in fast forwards mode for us when we see him, and vice versa from his perspective. Maybe he wonders why people move so slowly? Maybe he thinks that he is moving at normal speed, and we are all just slow pokes.

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  19. When Flash runs up a building he doesn't have enough friction to get up the building so is he leaping to get up the building or do you believe he is still running?

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    2. I think the Flash is still running. It is almost like a hurdle in a race. Since the Flash's stride length is so much longer than a normal human's, he could easily just use a building the same way a racer uses a hurdle, or the way someone hiking in the woods may have to step onto a tree trunk to continue on the path.

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  20. If Spiderman had caught Gwen Stacy by a different part of her body besides her leg would the damage had been less fatal?

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    1. I think it is possible that it would have been less fatal if she was caught from her leg, however the sudden stop could still damage her brain. According to one of the videos that we watched, the sudden stop could slam her brain into her skull, crushing it on impact.

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    2. I believe that the force exerted on Gwen Stacy's body would have been uniform no matter how she was caught. Because of her immediate deceleration, the force exerted on her bones and joints would still have killed her. Even if she was caught differently, she might have had an even slower and more painful death.

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  21. If Flash can run so fast, why doesn't his face have a bunch of cuts or bruises from particles hitting his skin at alarming rates?

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  22. If Flash is running at his full speed, wouldn't he have enough force to be able to fly up into the air?

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  23. If the Flash can move faster then the sped of sound, then what affect would he have on the ground under him after he stops suddenly, to turn or to rest?

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  24. If Spider-man can stand the sudden change in momentum when saving the window washer (because of his spider-strength), then how does the window washer still survive the momentum change?

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  25. If the flash runs at very high speeds, why doesn't his clothing get worn out quickly.

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  26. Would flash be able to run in outer space if he had some way of breathing?

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  27. I do not think that the flash could run in space regardless of breathing conditions. This is beacause in order to run the foot needs to exert force on an object(Newtons third law), such as the gorund, and the object will in turn exert an equal or oppisite force to propel the body forward, and in outer space there are no objects to push off of, given the exception of natural satalites. Another problem with this concept is that in outer space there is now gravity, there fore if there was a runway for him to run on he would not be able to stick to the surface. All in all The Flash could move in space, but not due to the action of running.

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  28. How would Gwen have been affected if she was not only pulled by the web but also pushed by impact at the same time? If she would die, then by what means would she die? Concussion? Some form of atrophy? Muscle damage? Other?

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