cuanto calor se le suministra a 500gr de agua para elevar su temperatura de 20 a 100 °C si sabemos que el calor espesifico del agua es de 1 cal / gr°C ​

Is the weather changing? consider the data of severe weather that includes tornadoes occurring throughout the u. s. over the last four years. compare the severe weather for the last three years. then compare the first three months of 2017 with that data. based on previous years, what might the prediction be for weather during 2017?