I get it's hard to put safety features on a motorcycle but I'm trying to convince my parents and I need a bike that's going to sound high quality for them. Thanks.
I do not even know how to answer this without being rude but, here I go. Hey dumb-a$$, Why don't you take you a$$ into the city, and I mean a medium sized city with at least a quarter of a million people. I have spent half my life in the suburbs and half in the city. And I have seen and attended many schools that do have metal detectors going in. But you don't need metal to kill-you just need someone willing to kill.
Imagine a flat pool table. The pool balls will always move in strait lines as they bounce around. This represents flat space-time. Objects in flat space move in predictable strait lines. The term space-time is used because space and time seem to both be distorted in extreme gravitation. Time slows down slightly for objects near a massive object. The more massive the object, the more extreme the effect. In contrast, imagine a rubber sheet with a bowling ball on it. The rubber sheet will sag under the weight of bowling ball. If i were to shoot a pool ball in a strait line towards my target, It would instead travel in a curved path because the rubber sheet itself is distorted. This effect is exaggerated the closer it comes to the bowling ball. Farther away it is less noticeable. Similarly, massive objects like the sun or a black hole, distort the space-time around them causing light, or any object to be deflected by this effect. In every day life, we experience this as gravity. The earth is very massive and it distorts the space-time around it causing enough gravitation to keep us on the planet but it is not enough to trap light like a black hole.
Relativity views space-time as a continuum; that is, time becomes another dimension of space, making space four-dimensional. This is really common sense-we know that it takes time to move through the physical dimensions of space. (length, width, and height) Time is a property of space that is distinct from yet closely related to the other three. (Although we know we can move through space in any direction, we can only move forward in time, at least until wormholes are discovered.) Curvature of space-time can be more difficult to understand. Although the rubber sheet model gives a picture of how it happens, one cannot easily picture the so-called nothingness of space being curved or a non-physical property like time being warped. But relativity (a theory which has yet to be disproved) predicts this curvature and uses gravity as proof of it. In fact, relativity predicts singularities, points in space-time where the curvature reaches infinity. Singularities are the centers of black holes, points of gravity so strong that nothing, not even light, can escape.
