London penetration depth for pb at 3k & 7.1k are 39.6nm and 17.3nm respectively. calculate its transition temperature (te) as well as penetration depth at 0k.

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

What are the applications of electromagnetic waves

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.