Recent content by Shayna

For example From 250 K to 300 K I got the Cv from the form =14.55 therefore Cp=Cv+R=22.84 LaTeX Code: Q = mC_v\\Delta T =0.68*10^-3 kg * 22.84* 50K = 776.56 J But that isn't right

Homework Statement A rigid container holds 0.680 g of hydrogen gas. How much heat is needed to change the temperature of the gas From 50 K to 100 K? From 250 K to 300 K? From 550 K to 600 K? From 2250 K to 2300 K? The Attempt at a Solution I calculated the first one using delta E_th =...

Okay, I start from scratch again and got the right answer I've made multiple mistakes due to carelessness in term of unit. Thanks so much

I got the work done by calculating area under the curve which is -50.7J I also calculated the temperature change delta T= T1-T2 = nR/(p1V1-p2V2)= -67.75K I also tried specific heat, which q= Cq * n* delta T = 28.82 J/mol*K * 1.8*10^-2 mol * 67.2585 K = -35.1 J But that wasn't the answer I don't...

enn, well, I calculated the area wrong, but how do I find out about the heat transfered?

Homework Statement A 3000 cm3 container holds 0.10 mol of helium gas at 300C. How much work must be done to compress the gas to 1000 cm3 at constant pressure? How much work must be done to compress the gas to 1000 cm3 at constant temperature? The attempt at a solution W = integration...

Homework Statement The figure shows a thermodynamic process followed by 1.80×10−2 mol of hydrogen. How much work is done on the gas? By how much does the thermal energy of the gas change? How much heat energy is transferred to the gas?The attempt at a solution I thought the work done to gas...

I actually didn't quite understand the converting between F and C, 0C in Z Maybe 190C/1728C = X/1000Z therefore 109Z? Then should 100C in Z be 290/1728 = Z/1000 therefore 167.82? I think MasPhys liked my answer this time. Thanks a lot :) Have a good Thanksgiving.

A demented scientist creates a new temperature scale, the "Z scale." He decides to call the boiling point of nitrogen 0 Z and the melting point of steel 1000 Z. What is the boiling point of water on the Z scale? Convert 200 Z to the Celsius scale. Convert 200Z to the Kelvin scale...

Thanks, the radius was the only thing, thickness was given as a trick condition

Homework Statement A research submarine has a 40.0 cm-diameter window 8.50 cm thick. The manufacturer says the window can withstand forces up to 1.20×10^6 N. What is the submarine's maximum safe depth? The Attempt at a Solution The area which force will be exerted on is A= Pai * r^2 =...

yes but that shouldn't be affecting the answer though, cos140degree = cos(14/9)pai Thanks though

Physics work problem -- mastering physics Homework Statement Find the work W done by the 15-Newton force. Homework Equations W=\vec F\cdot\vec s=\left|\vec F\right|\left|\vec s\right|\cos \theta The Attempt at a Solution W= 15*cos140*160 = -1838.506 I don't know why mastering physics was...