Please help!! I'm trash at chemistry
What type of heat transfer is a beaker on a hot plate an example of?

conduction
radiation
covection
chemical

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

Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.

Ascientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. which term most likely describes what she is measuring?