[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:14.93,0:00:18.48,Default,,0000,0000,0000,,Some superheros can move\Nfaster than the wind.
Dialogue: 0,0:00:18.50,0:00:20.37,Default,,0000,0000,0000,,The men in Apollo 10 reached
Dialogue: 0,0:00:20.39,0:00:21.61,Default,,0000,0000,0000,,a record-breaking speed
Dialogue: 0,0:00:21.64,0:00:24.43,Default,,0000,0000,0000,,of around 25,000 miles per hour
Dialogue: 0,0:00:24.45,0:00:25.74,Default,,0000,0000,0000,,when the shuttle re-entered
Dialogue: 0,0:00:25.76,0:00:28.28,Default,,0000,0000,0000,,the Earth's atmosphere in 1969.
Dialogue: 0,0:00:28.30,0:00:30.02,Default,,0000,0000,0000,,Wouldn't we save a lot of time
Dialogue: 0,0:00:30.05,0:00:32.23,Default,,0000,0000,0000,,to be able to move that fast?
Dialogue: 0,0:00:32.25,0:00:34.90,Default,,0000,0000,0000,,But what's the catch?
Dialogue: 0,0:00:34.92,0:00:36.58,Default,,0000,0000,0000,,Air is not empty.
Dialogue: 0,0:00:36.61,0:00:38.70,Default,,0000,0000,0000,,Elements like oxygen and nitrogen,
Dialogue: 0,0:00:38.73,0:00:40.37,Default,,0000,0000,0000,,even countless dust particles,
Dialogue: 0,0:00:40.39,0:00:42.38,Default,,0000,0000,0000,,make up the air around us.
Dialogue: 0,0:00:44.81,0:00:47.13,Default,,0000,0000,0000,,When we move past these things in the air,
Dialogue: 0,0:00:47.15,0:00:48.20,Default,,0000,0000,0000,,we're rubbing against them
Dialogue: 0,0:00:48.23,0:00:49.87,Default,,0000,0000,0000,,and creating a lot of friction,
Dialogue: 0,0:00:49.90,0:00:51.43,Default,,0000,0000,0000,,which results in heat.
Dialogue: 0,0:00:51.46,0:00:53.89,Default,,0000,0000,0000,,Just like rubbing your hands\Ntogether warms them up
Dialogue: 0,0:00:53.91,0:00:55.95,Default,,0000,0000,0000,,or rubbing two sticks together makes fire,
Dialogue: 0,0:00:55.97,0:00:57.50,Default,,0000,0000,0000,,the faster objects rub together,
Dialogue: 0,0:00:57.52,0:00:59.80,Default,,0000,0000,0000,,the more heat is generated.
Dialogue: 0,0:01:01.45,0:01:04.27,Default,,0000,0000,0000,,So, if we're running\Nat 25,000 miles per hour,
Dialogue: 0,0:01:04.30,0:01:08.38,Default,,0000,0000,0000,,the heat from friction\Nwould burn our faces off.
Dialogue: 0,0:01:09.53,0:01:11.44,Default,,0000,0000,0000,,Even if we somehow withstood the heat,
Dialogue: 0,0:01:11.46,0:01:12.94,Default,,0000,0000,0000,,the sand and dirt in the air
Dialogue: 0,0:01:12.96,0:01:14.16,Default,,0000,0000,0000,,would still scrape us up
Dialogue: 0,0:01:14.19,0:01:15.59,Default,,0000,0000,0000,,with millions of tiny cuts
Dialogue: 0,0:01:15.61,0:01:17.81,Default,,0000,0000,0000,,all happening at the same time.
Dialogue: 0,0:01:19.04,0:01:22.06,Default,,0000,0000,0000,,Ever seen the front bumper\Nor grill of a truck?
Dialogue: 0,0:01:22.08,0:01:24.42,Default,,0000,0000,0000,,What do you think all the birds\Nand bugs would do
Dialogue: 0,0:01:24.44,0:01:27.56,Default,,0000,0000,0000,,to your open eyes or exposed skin?
Dialogue: 0,0:01:31.60,0:01:33.56,Default,,0000,0000,0000,,Okay, so you'll wear a mask
Dialogue: 0,0:01:33.59,0:01:35.14,Default,,0000,0000,0000,,to avoid destroying your face.
Dialogue: 0,0:01:35.17,0:01:36.88,Default,,0000,0000,0000,,But what about people in buildings
Dialogue: 0,0:01:36.91,0:01:39.19,Default,,0000,0000,0000,,between you and your destination?
Dialogue: 0,0:01:39.21,0:01:41.94,Default,,0000,0000,0000,,It takes us approximately\None-fifth of a second
Dialogue: 0,0:01:41.97,0:01:43.31,Default,,0000,0000,0000,,to react to what we see.
Dialogue: 0,0:01:43.33,0:01:45.14,Default,,0000,0000,0000,,By the time we see what is ahead of us
Dialogue: 0,0:01:45.17,0:01:46.10,Default,,0000,0000,0000,,and react to it -
Dialogue: 0,0:01:46.13,0:01:47.69,Default,,0000,0000,0000,,time times velocity equals distance
Dialogue: 0,0:01:47.71,0:01:48.71,Default,,0000,0000,0000,,equals one-fifth of a second
Dialogue: 0,0:01:48.73,0:01:50.07,Default,,0000,0000,0000,,times 25,000 miles per hour
Dialogue: 0,0:01:50.09,0:01:51.86,Default,,0000,0000,0000,,equals 1.4 miles
Dialogue: 0,0:01:51.88,0:01:53.39,Default,,0000,0000,0000,,- we would have gone past it
Dialogue: 0,0:01:53.42,0:01:56.08,Default,,0000,0000,0000,,or through it by over a mile.
Dialogue: 0,0:01:56.11,0:01:57.82,Default,,0000,0000,0000,,We're either going to kill ourselves
Dialogue: 0,0:01:57.84,0:02:00.16,Default,,0000,0000,0000,,by crashing into the nearest\Nwall at super speed
Dialogue: 0,0:02:00.19,0:02:02.56,Default,,0000,0000,0000,,or, worse, if we're indestructible,
Dialogue: 0,0:02:02.58,0:02:04.92,Default,,0000,0000,0000,,we've essentially turned\Nour bodies into missiles
Dialogue: 0,0:02:04.94,0:02:08.13,Default,,0000,0000,0000,,that destroy everything in our path.
Dialogue: 0,0:02:08.15,0:02:11.04,Default,,0000,0000,0000,,So, long distance travel\Nat 25,000 miles per hour
Dialogue: 0,0:02:11.07,0:02:12.84,Default,,0000,0000,0000,,would leave us burning up,
Dialogue: 0,0:02:12.86,0:02:13.63,Default,,0000,0000,0000,,covered in bugs,
Dialogue: 0,0:02:13.66,0:02:16.64,Default,,0000,0000,0000,,and leaves no time to react.
Dialogue: 0,0:02:16.66,0:02:17.75,Default,,0000,0000,0000,,What about short bursts
Dialogue: 0,0:02:17.78,0:02:18.86,Default,,0000,0000,0000,,to a location we can see
Dialogue: 0,0:02:18.89,0:02:20.92,Default,,0000,0000,0000,,with no obstacles in between?
Dialogue: 0,0:02:20.94,0:02:22.38,Default,,0000,0000,0000,,Okay, let's say a bullet
Dialogue: 0,0:02:22.41,0:02:26.63,Default,,0000,0000,0000,,is about to hit a beautiful\Ndamsel in distress.
Dialogue: 0,0:02:26.66,0:02:28.92,Default,,0000,0000,0000,,So, our hero swoops in at super speed,
Dialogue: 0,0:02:28.94,0:02:29.60,Default,,0000,0000,0000,,grabs her,
Dialogue: 0,0:02:29.62,0:02:32.35,Default,,0000,0000,0000,,and carries her to safety.
Dialogue: 0,0:02:32.37,0:02:34.31,Default,,0000,0000,0000,,That sounds very romantic,
Dialogue: 0,0:02:34.33,0:02:36.57,Default,,0000,0000,0000,,but, in reality, that girl\Nwill probably suffer
Dialogue: 0,0:02:36.59,0:02:38.55,Default,,0000,0000,0000,,more damage from the hero than the bullet
Dialogue: 0,0:02:38.57,0:02:40.46,Default,,0000,0000,0000,,if he moved her at super speed.
Dialogue: 0,0:02:40.48,0:02:44.53,Default,,0000,0000,0000,,Newton's First Law of Motion\Ndeals with inertia,
Dialogue: 0,0:02:44.56,0:02:46.28,Default,,0000,0000,0000,,which is the resistance to a change
Dialogue: 0,0:02:46.30,0:02:48.20,Default,,0000,0000,0000,,in its state of motion.
Dialogue: 0,0:02:48.23,0:02:49.85,Default,,0000,0000,0000,,So, an object will continue moving
Dialogue: 0,0:02:49.87,0:02:51.31,Default,,0000,0000,0000,,or staying at the same place
Dialogue: 0,0:02:51.34,0:02:53.40,Default,,0000,0000,0000,,unless something changes it.
Dialogue: 0,0:02:53.43,0:02:57.07,Default,,0000,0000,0000,,Acceleration is the rate\Nthe velocity changes over time.
Dialogue: 0,0:02:57.09,0:02:58.49,Default,,0000,0000,0000,,When the girl at rest,
Dialogue: 0,0:02:58.51,0:03:00.13,Default,,0000,0000,0000,,velocity equals zero miles per hour,
Dialogue: 0,0:03:00.15,0:03:02.74,Default,,0000,0000,0000,,begins accelerating to reach\Nthe speed within seconds,
Dialogue: 0,0:03:02.76,0:03:04.04,Default,,0000,0000,0000,,velocity increases rapidly
Dialogue: 0,0:03:04.07,0:03:06.67,Default,,0000,0000,0000,,to 25,000 miles per hour,
Dialogue: 0,0:03:06.69,0:03:09.68,Default,,0000,0000,0000,,her brain would crash\Ninto the side of her skull.
Dialogue: 0,0:03:09.70,0:03:11.99,Default,,0000,0000,0000,,And, when she stops suddenly,
Dialogue: 0,0:03:12.02,0:03:14.89,Default,,0000,0000,0000,,velocity decreases rapidly\Nback to zero miles per hour,
Dialogue: 0,0:03:14.92,0:03:17.69,Default,,0000,0000,0000,,her brain would crash\Ninto the other side of her skull,
Dialogue: 0,0:03:17.71,0:03:21.99,Default,,0000,0000,0000,,turning her brain into mush.
Dialogue: 0,0:03:22.02,0:03:25.89,Default,,0000,0000,0000,,The brain is too fragile\Nto handle the sudden movement.
Dialogue: 0,0:03:25.92,0:03:27.90,Default,,0000,0000,0000,,So is every part of her\Nbody, for that matter.
Dialogue: 0,0:03:27.92,0:03:30.45,Default,,0000,0000,0000,,Remember, it's not the speed\Nthat causes the damage
Dialogue: 0,0:03:30.47,0:03:32.80,Default,,0000,0000,0000,,because the astronauts survived Apollo 10,
Dialogue: 0,0:03:32.82,0:03:34.22,Default,,0000,0000,0000,,it's the acceleration
Dialogue: 0,0:03:34.25,0:03:35.76,Default,,0000,0000,0000,,or sudden stop
Dialogue: 0,0:03:35.78,0:03:37.36,Default,,0000,0000,0000,,that causes our internal organs
Dialogue: 0,0:03:37.39,0:03:39.15,Default,,0000,0000,0000,,to crash into the front of our bodies
Dialogue: 0,0:03:39.17,0:03:40.70,Default,,0000,0000,0000,,the way we move forward in a bus
Dialogue: 0,0:03:40.72,0:03:42.83,Default,,0000,0000,0000,,when the driver slams on the brakes.
Dialogue: 0,0:03:43.44,0:03:44.98,Default,,0000,0000,0000,,What the hero did to the girl
Dialogue: 0,0:03:45.01,0:03:47.50,Default,,0000,0000,0000,,is mathematically the same\Nas running her over
Dialogue: 0,0:03:47.52,0:03:50.62,Default,,0000,0000,0000,,with a space shuttle at maximum speed.
Dialogue: 0,0:03:50.64,0:03:53.75,Default,,0000,0000,0000,,She probably died instantly\Nat the point of impact.
Dialogue: 0,0:03:53.77,0:03:56.45,Default,,0000,0000,0000,,He's going to owe this poor\Ngirl's family an apology
Dialogue: 0,0:03:56.47,0:03:58.100,Default,,0000,0000,0000,,and a big fat compensation check.
Dialogue: 0,0:03:59.02,0:04:02.27,Default,,0000,0000,0000,,Oh, and possibly face jail time.
Dialogue: 0,0:04:02.29,0:04:04.25,Default,,0000,0000,0000,,Doctors have to carry liability insurance
Dialogue: 0,0:04:04.27,0:04:07.06,Default,,0000,0000,0000,,just in case they make a mistake\Nand hurt their patients.
Dialogue: 0,0:04:07.09,0:04:10.53,Default,,0000,0000,0000,,I wonder how much superhero\Ninsurance policy would cost.
Dialogue: 0,0:04:11.96,0:04:14.45,Default,,0000,0000,0000,,Now, which superpower physics lesson
Dialogue: 0,0:04:14.47,0:04:16.95,Default,,0000,0000,0000,,will you explore next?
Dialogue: 0,0:04:16.97,0:04:21.11,Default,,0000,0000,0000,,Shifting body size and content,
Dialogue: 0,0:04:21.14,0:04:22.53,Default,,0000,0000,0000,,super speed,
Dialogue: 0,0:04:22.56,0:04:24.19,Default,,0000,0000,0000,,flight,
Dialogue: 0,0:04:24.21,0:04:27.14,Default,,0000,0000,0000,,super strength,
Dialogue: 0,0:04:27.16,0:04:29.67,Default,,0000,0000,0000,,immortality,
Dialogue: 0,0:04:29.69,0:04:31.58,Default,,0000,0000,0000,,and
Dialogue: 0,0:04:31.60,0:04:34.08,Default,,0000,0000,0000,,invisibility.