Recent content by kirchwey

Air convection is upward because that's opposite to the direction of gravity. It's the same phenomenon as buoyancy. Gravity is responsible for less dense materials having buoyancy when immersed in a more dense medium. Since hot air is less dense than cold air, gravity causes it to rise...

You said water at -10 C and didn't give the heat of fusion of water, so I'm assuming it's supercooled water! Tf = 30.225 C Step by step: Basic equation for final (f) state of an N-component mixture expresses the equality of initial and final heats: mfcfTf = Σ(i=1,N)(miciTi) Since mfcf =...

First let's solve for T leaving out the evaporated water, which for this step ends up at 38 C like the rest of the mixture: Basic equation for final (f) state of an N-component mixture expresses the equality of final and initial heats: mfcfTf = Σ(i=1,N)(miciTi). Since mfcf = Σ(i=1,N)(mici)...

Lorentz force: F = qv X B, where X is the vector cross product. Right-hand rule: Orient fingers such that they represent the smaller rotation of the first RHS cross-product term (qv, and remember sign of q is important) into the second RHS cross-product term (B). Then the extended thumb points...

Lorentz force: F = qv X B, where X is the vector cross product. Right-hand rule: Orient fingers such that they represent the smaller rotation of the first RHS cross-product term (qv, and remember sign of q is important) into the second RHS cross-product term (B). Then the extended thumb points...