Homework Statement
A nano-tube having cross sectional area A and length L extends ΔL when a force F is applied normally to one of the cross-sectional surfaces. Show that if N tubes are connected end-to-end the then Young's modulus of the fibre does not change.
Homework EquationsThe Attempt at...
Yes I guess when it comes to my self guided quad-copter I'm going to have to set the initial altitude to the reference or maybe use an external altitude sensor.
I'm a programmer/electronics student and I recently bought a GPS which I hooked up serially with my laptop. I didn't get into much detail of encoding the string which is output from the TX/RX pins of the GPS so I downloaded, a ready made program called "ublox 6". Longitude and latitude are...
Thanks for your reply! Alright I see what you mean.
Second attempt:
Number of moles in gas using ideal gas equation:
R= 8.314 4621 J mol-1 K-1 (Given in exam paper booklet):
n=(PV/RT)
n=(1.5x105Pa*1.25x10-3m3)/(8.314*300K)
n=0.075
Change in temperature using Charles law would be: 372K...
Homework Statement
Can someone help me confirm if I answered correctly please?
a) A sample of gas is enclosed in a cylinder by a piston. The cylinder is given 225J of energy which expands and pushes the piston 16cm outwards against an atmospheric pressure of 1.01x105Pa.
i) give the equation...
(Heat lost changing state + Heat lost due to change in temperature) = Heat Gained
When changing water to steam it would be heat required.
But when steam is changed back to water, is it heat energy gained or lost?
Oh right.
mc∆θ=mc∆θ
m*4200*2.26x106Jkg-1*(100-80)=0.08*4200*(60)
m=1.06x10-7kg
Q=ml is the energy used to convert the water into steam and vice versa without a change in temperature, and the specific heat capacity * change in temperature indicates the heat lost?
Like this? Sorry if I might be frustrating you, I don't blame you.
Left side is the water added to the cup, assuming the water is at 100C.
mc∆θ=mc∆θ
m*4200(100-80)=0.08*4200*(60)
m=0.24kg