QUESTION 6 Estimate the enthalpy change (J/g) for air being heated from 250 C to 350 C. At 300 K the specific heat at constant pressure, cp, is 1.005 J/g/K and this value does not change much for temperatures surrounding 300K. Give 1 decimal in your answer.

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?