A peacock flashes its bright plumage to attract a panchen. men peacocks have bright feathers, which have been observed for generations. What's the process that allows for the transfer of this trait?

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

What does x represent in the formula for the compound xcl4?

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?