___ used by dentists to protect dental patients from x-rays___used by nasa because it is a good reflector of infrared radiation and it is corrosion resistant___radioactive element used in smoke detectors___used in thermometers___the gas that we breath___useful because it is a good reflector of heat___used to make artifical body implants___used as a filament in light bulbsOKK ahhanow these are the answers i can choose fromtitaniumleadtungstenmercuryoxygenamericiumgoldcopperaluminum
A large shipping box traveling inside a U-Haul
We don't know. That's what the universe is: a big question mark.
we are confined ,so far to this planet by its gravity/mass, around the sun orbital velocity,as are the universe boundaries,what is the outside made up of?,wdk
cardboard is a great insulator. could not be exact on the length of time it will keep ice from melting, that would depend on how thick the ice is and where your project would be kept for the 8 hours. I would think that from your rules, you could double or triple the thickness of the cardboard and it should keep the ice from melting. Gool Luck
This is one that's really difficult to grasp - even if you *think* you have grasped it (like myself). Imagine this - - Imagine the Universe as a large, flat (2-D) sheet. Make the sheet out of some sort of rubbery material. Now, wrap the sheet into a cylinder. And now close off the ends ( so you have the 'skin' of a rubber balloon. (Remember - the universe is the *skin* of the balloon) Now - start inflating the balloon - - larger and larger. The balloon is getting larger - and most people are imagining the universe as the ball contained inside the balloon - - but its not! Its the *skin* of the balloon! That 'skin' is getting larger and larger - but what is it ''expanding into'? Nothing! There isn't an 'outside' that it is moving into - its just becoming larger! Now - the universe is *not* a 2-D rubber sheet - its 3-D - - but the same principle actually applies.
