Which two statements are true of mechanical waves? A. They transfer energy by disturbing electric and magnetic fields.
B. They use a medium to transfer energy.
O c. They travel by causing particles of matter to vibrate.
D. They do not need a medium to transfer energy.

Diamond will scratch quartz. true or false

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

Which subatomic particle has a negative charge