mrs. smith's class is doing an experiment with thermometers. they fill up a cup with boiling water and sit it on the counter. they plan to check the temperature of the water in the cup after 5, 10, 15, and 30 minutes. what will mrs. smith's class observe about the temperature of the water after 30 minutes? a) the temperature of the water will decrease. b) the temperature of the water will stay the same. c) the temperature of the water will increase greatly. d) the temperature will increase first and then decrease.