true or false under a normal state the number of electrons then the body is said to be negatively charged

Agas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kpa to a final volume of 0.065 m^3 while its temperature is kept constant. how much work is done by the system?

If a balloon is taken outside on a very cold day, what will occur?

What does si stand for,when referring to a system of measurement