Recent content by NDbogan

Thanks, some of them really do find it hard to understand so just related it all back to states of matter and did a number of labs. However some of them were quite prepared for kinetic theory, etc. As a student teacher, my university supervisor was impressed.

Homework Statement On a warm day, a student uses a tire gauge to test the air pressure of her tires. While listening to the weather report on the way to the garage, she finds that the barometric pressure is 780mmHg. If the gauge reads a pressure of 35psi, what is the actual pressure inside...

Homework Statement So I'm teaching a year 8 (12 year olds) class on air or the properties of air. Does anyone have any ideas of what I should tell them or how to explain these properties in a understandable way? Homework Equations In the document that I have been given it says that I...

thanks for you opinion. i have been told that the lecturer for the class is the same guy we had for our physics/chem classes and he was really good with those. I was able to pick-up chemistry which i dropped in my final year at school! thanks again

Homework Statement Ok, its not exactly related to this section but I need your help! I want to do maths as minor at university. My major is in science as I started doing a sport science degree and didn't want to waste all the units I had done. My university only has 3 maths units so I...

It is a little too late for an experiment. I missed this question in my assignment which is due in 7hrs. is it possible you could explain it further?

1. Sun falls both on a pair of reading glasses and a dark pair of sunglasses. Which pair would you expect to become warmer? defend you anser. At first it reminded me of the white car, black car type question. But then I realized sunglasses are meant to block UV ray, etc. and are usually...

i ended up doing it using boyle's law P1 x V1/T1=P2 x V2/T2 because temp is a constant P1 x V1=P2 x V2 where P1= 700 atm = 10290psi V1=2m^3= .002L P2=14.7 psi V2=? because this is want we were to find so V2=(10290 x .002)/14.7 = 1.4L probably isn't correct but i did try with...

thanks so much rl. you are a legend

A gas cylinder contains 2 cubic metres of air at a pressure of 700 atmospheres at room temperature. Calculate the volume of air in the cylinder at one atmospheric pressure at room temperature. If the air is drawn from the cylinder at the rate of 15 litres/minute, how lonf will the...

had that the first time and thought i was wrong. that being the case so: distance covered=u.t + 1/2.a.t^2 =(83.33 x 12) + (1/2 x -6.25 x 144) =999 + -450 =549m then add the safety margin =549 + 250 = 799m = 0.799km you must hate me by now =]

that was for ur first quote. as for the second half...no idea

could it have something to do with work? or the truck has a larger mass so despite how much force is exerted and there is energy is spent but there is no work seen...

ok so it would be a=(v-u)/t =(108-1080)/12 =-81m/s so: distance covered=u.t + 1/2.a.t^2 =(1080 x 12) + (1/2 x -81 x 144) =12960 + -360 =12600m then add the safety margin =12600 + 250 = 12850m = 12.85km maybe?

hmm...could you explain it a bit further.