Recent content by tweety1234

Hello, I am trying to write a mtlab code to compute Frobenius norm of an mxn matrix A. defined by ||A||_{F} = \sqrt{ \sum_{i=1}^m \sum_{j=1}^n a^{2}_{i,j}} I have so far written this code, but it does not work, if anyone can help /guide me to the right path, would be greatly...

is it W = \int^v_v p dv

Homework Statement A chemical reaction takes place in a container of cross-sectional area 100 cm2. The container has a loosely fitting piston at one end. As a result of the reaction, then piston is pushed out by 10 cm against an external pressure of 101.3 kPa. Calculate the work of expansion...

Dont worry, I got it, thanks for your help.

4? But how does that make 320?

Homework Statement Calculate wall loss rate in BTUs per hour. For a 10 ft by 10 ft room with an 8 ft ceiling, with all surfaces insulated to R19 as recommended by the U.S. Department of Energy, with inside temperature 68°F and outside temperature 28°F: heat loss = \frac{Q}{t} = \frac{(Area)...

Q = mcT

you go from solid to liquid to gas, so you have to calculate the heat for each stage than add up the total of each stage. I think, also, for the vaporization you would use Q =ml where L = latent heat of vaporization.. and Q=ml again for latent heat of fusion/melting I think that's how you do it...

Homework Statement A large pot of water is boiling on the stove. The pot has a heavy, close tting lid which has a small hole to allow steam to escape, so that the lid does not lift up from the pot. However, if too much steam is produced to escape through the hole, the lid will lift to release...

But the expression wants x/r?

oh I thought we might have to make use of the equation relating x and r given in the question ?

Homework Statement Heat is being conducted radially through a cylindrical pipe. The temperature at a radius r is T(r). In Cartesian co-ordinates, r = \sqrt{(x^{2}+ y^{2}}) show that \frac{\partial T}{\partial x} = \frac{x}{r} \frac{dT}{dr}

Homework Statement a) A slab of thickness L and constant thermal conductivity \lambda generates heat at a constant rate throughout of g W m–3. The heat is dissipated from both sides of the slab by convection into the ambient air at a temperature Tf with a heat transfer coefficient h. The...

Anyone know?

Homework Statement A fluid of relative density 0.86 and viscosity 0.003 pa flows through a pipe of 12cm diameter. The flow rate is measured using an orifice plate with a 6cm diameter orifice, with pressure tapping connected to a differential U-tube manometer using mercury (density = 13600 kg...