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Homework Statement relative to A, B is moving towards A at a speed of 0.4c. Farther out C is moving towards A at a speed of 0.5c. all motion is along the x-axis how fast is C moving relative to B? Homework Equations U = (U' + V) / 1+ VU'/c^2 The Attempt at a Solution...

ΔH formation is +'ve shouldn't my answer be negative since the system has less potential energy. 1/2 H2 -> H

right?

so then ΔU = ΔH -P(dv) ΔU = ΔH - ∫ nRT/V dv ΔU = ΔH - nRT ln(vf/vi) ΔU = 218kJ - 1 mol * 8.21 J/k Mol *298 K * ln2 ΔU = 216kJ ?

guys...

anyone?

Homework Statement Enthalpy of formation of a mole of atomic hydrogen = 218kJ. Enthalpy changes when a mole of atomic hydrogen is formed by dissociating half a mole of molecular hydrogen. Calculate ΔU of the process of molecular hydrogen dissociation. Homework Equations ΔH = ΔU + Δ(PV)...

Haha, Thank you so much :)

I think so, the answer I got was 2 * 10^-7 N Is that correct?

guys..

Homework Statement Find the force necessary to give a proton an acceleration of 10^19m/s^2 when the proton has a velocity ( along the same direction as the force) of 0.9c Homework Equations p=gamma * m * U F = d/dt [gamma * M * U] F=gamma^3 *m*a The Attempt at a Solution initial momentum...

cool beans

(0.5/0.0005) -25 = 975 ?

idk VV=Ifs(Rsh+Rh)

Homework Statement The resistance of a galvanometer coil is 25ohms and the current required for full scale deflection is 500μA. a) explain how to convert the galvanometer to an ammeter reading 20mA full scale, and compute the shunt resistance b) explain how to convert the galvanometer to a...