When you are floating in water with your lungs full of air and you exhale, you sink ower in the water. Which is more significant in causing you to sink, your change of mass or your change of density?

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?

How many times did thomas edison mess up the light bulb

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.