Using a 2cm thick piece of cardboard over a radiation source would be most effective for protecting against which type of radiation?

Which best describes why nh4+ can form an ionic bond with cl-?

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled