Recent content by sweetdreams12

Okay so if I take it one step at a time: expressing Tαβγ in terms of Tαβγ without taking into account the vector, I use the metric tensor. gαμ(Tμβγ) would then equal gγμ(Tαβμ) = Tαβγ. Is that right?

A previous part asked to express Tαβγ in terms of Tαβγ and I put my answer as ∂xα/∂xi*∂xβ/∂xj*∂xγ/∂xk*Tijj or by using the metric tensor however does that also apply to vectors? if not, I don't know how vα relates to vα... edit: wait is vα related to vα by vα = ∂xβ/∂xα*v'β?

Homework Statement A tensor and vector have components Tαβγ, and vα respectively in a coordinate system xμ. There is another coordinate system x'μ. Show that Tαβγvβ = Tαβγvβ Homework Equations umm not sure... ∇αvβ = ∂vβ/∂xα - Γγαβvγ The Attempt at a Solution Tαβγvβ =...

meaning they are non-accelerating...so Sally isn't accelerating hence she can't see the shifted frequency?

Just some conceptual ideas that I don't understand A spaceship starts falling under gravity with an acceleration g as measured by an observer Barry at rest on Earth. At the instant that the ship starts to fall, an astronaut Harry at the base of the rocket ship sends a light signal of frequency...

So I've just been reading about the Stern-Gerlach apparatus/experiment and had some questions about the half spin probabilities... First let's say a collection of spin-half particles are sent through a S-G apparatus (which I know measures the z component of particles spin angular momentum)...

ummmm I still don't get it xD do I use the equation: Q = mC deltaT?

A “blackbody heat shield” is used to reduce radiant heat loss in situations where standard low conductivity insulation (i.e. normal insulation) cannot be used. The shield is constructed using a set of parallel metal sheets, each with emissivity 1.0. Explain how/why this “heat shield” works...