The density of the Earth is greater than the density of an equal volume of water by . 5½ times
3½ times
1½ times
7½ times

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

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?

An alien spaceship is 500 m above the ground and moving at a constant velocity of 150 m/s upwards. how high above the ground is the ship after 5 seconds?