I just found an fire extinguisher, how can you tell how old it is and if it is still any good?
Definitely those without the full-face. first, puts huge strain/risk on your eyes, and 60% of head impacts in crashes occur on your face/chin. Those half-helmets are retarded. Shorts kinda look dumb, but will do no less to protect your leg skin than pants or jeans in a wreck. The only thing that will prevent road rash is leather or armor.
Here's a classic one you can use to show the effects of gravity on space, a big part of what defines a black hole. You will need: a sheet of rubber or other flexible material several small, round objects of various sizes and weights. What you do: 1. Stretch out the sheet of rubber in some way (this is where your imagination comes in!). 2. Take the small objects and note how they change the shape of the rubber. 3. Place a larger, heavier object on the sheet. Take a smaller, lighter object and try to roll it past the heavy one without hitting it. Experiment with different weights and sizes and notice how the speed of the small object changes with the weight of the larger. 4. (save this for absolute last). Cut a small hole in the sheet and tape it to the floor or otherwise stretch it out and down. Now roll the small object past. Notice what happens if it gets too close or isn't rolling fast enough. The Point: Space is a little bit like your rubber sheet. It bends and stretches based on the objects in it and their masses. A black hole is the last thing you did: it creates a 'rip' in space and so objects that aren't moving fast enough or get too close fall 'off the sheet' and out of reach. I hope this helps you. dark_phantom_jedi
