How fast must a meter stick be moving if its length is observed to shrink to 0.7 m?

Match the atomic particles with their characteristics. 1. made of two protons and two neutrons neutron 2. similar to an electron; positive charge neutrino 3. orbits nucleus; negative charge positron 4. bundle of energy; zero charge proton 5. found in nucleus; positive charge meson 6. very unstable; +, -, or zero charge gamma 7. found in nucleus; zero charge electron 8. negative particle; negative charge beta 9. atomic energy converted to mass alpha

How does convection affect our atmosphere? our layers of earth? our oceans?

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.