Next Physics e-lesson 5.12+5.15

Questions

·         Why does the needle on the meter move when gas particles are introduced into the box?

·         What does the meter measure?

 

 

 

Answers

·         The gas particles collide with all of the walls of the container.  The wall on the right moves outwards and moves the needle.

·         Pressure.  The gas particles colliding with the walls makes a force on the walls.  The walls have a surface area so the quantity measured is pressure, p=F/A.

 

 

5.12+5.15 Questions

02 November 2011

15:55

·         5.12 recall that molecules in a gas have a random motion and that they exert a force and hence a pressure on the walls of the container

·         5.15 understand that an increase in temperature results in an increase in the speed of gas molecules

Try the animation http://www.lon-capa.org/~mmp/kap10/cd283.htm

Ideal gases - summary of terms.pptx Download this file