Search our library of Physics questions

Top answers

Physics

All levels

Derive kepler's third law

F = G(Mm/r^2)F = mv^2/rG(Mm/r^2) = mω^2rω = 2π/TG(Mm/r^2) = 4π^2mr/T^2GM/r^3 = 4π^2/T^2T^2 = r^3 (4π^2/GM)

1872 Views

A golf ball is hit at an angle θ=45° to the horizontal with an initial speed v0. A vertical wall of height h=10m lies a distance d=20m away. Determine the minimum initial speed v0 required for the ball to clear the wall. Air resistance is negligible.

(I have a picture of a full explanation saved on my computer and I can show this or recreate using the whiteboard during interview if required.)
Physics: Newton's 2nd L...

Answered by • Physics tutor

3597 Views

The Σ0 baryon, composed of the quark combination uds, is produced through the strong interaction between a π+ meson and a neutron. π+ + n →Σ0 + X What is the quark composition of X?

Multiple choice answers:A: u s-barB: u dC: u d-barD: u d s-barThis question requires you to have memorised:the quark content of a neutron and all the pions,that strangeness number and baryon number are co...

Answered by • Physics tutor

9346 Views

how do you calculate the charge of a neuclues compared to an ion?

With an neucleus, the charge is calculated by using the formula: number of protons x the charge of a single electron with an ion, the charge is calculated using the formula:number of extra charge x charge...

Answered by Kulsoom Q. • Physics tutor

1767 Views

A Uranium-(238,92) nucleus decays into a Thorium-234 nucleus by the emission of an alpha-particle. Given Thorium has a chemical symbol Th build a nuclear equation.

A nuclear equation expresses all of the elements before (LHS of = sign) and after (RHS of = sign) the reaction in terms of nucleon (N) and proton number (A), both quantities are conserved during the react...

Answered by Alistair G. • Physics tutor

6176 Views