A solid object with the density of 2.8 g/mL is placed in water. What will most likely happen? (a) It will dissolve.

(b) It will float.

(c) It will sink.

(d) It will melt.

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Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg