Physics

Physics, 10.07.2019 18:20, kingbolt1

Neutrons emerge from a plane surface into a vacuum with an angular flow rate proportional to the square of the cosine of the angle with respect to an outward normal fi to the surface. let j, n be the net flow rate at the surface. what is the total (not angular) flux density in terms of jn?

answer

Answers: 3

Show answers

Similar questions

Предмет

Physics, 27.06.2019 00:30, paytonrules3634

Apoint source emits s n/s isotropically in an infinite vacuum in steady state general hint: this is not a diffusion problem - a vacuum is certainly not a) show that the scalar flux at a distance r from the source is exactly s/a4tr] hint: think of a very very thin spherical shell of inner radius r, outer radius r + dr. at what rate do neutrons make tracks in this shell? how many neutrons per second enter this shell? how far does each one go in the shell? at what rate per unit volume? exactly what is the net current density at a distance r from the source? hint: at what rate do neutrons leak through a spherical surface of radius ? what st the net current density be to produce this leakage rate? b) repeat problem 5 given a medium with absorption but no scattering or fission. (hint: this just throws in an attenuation factor.)

Answers: 1

Предмет

Physics, 05.07.2019 00:30, jm900643

Consider a ball (with moment of inertia i=2/5mr^2) which bounces elastically off a surface. assume that the ball’s speed in the direction perpendicular to the surface is the same before and after a bounce. also, assume that the ball is made of a type of rubber which allows it to not slip on the surface (which has friction) during the bounce. (this implies that the angular and linear motions may affect each other.)the ball is projected from the surface of a plane which is inclined at angle θ.the initial velocity of the ball is perpendicular to the plane and has magnitude v. the initial angular velocity is zero. find the component of the ball’s velocity along the plane, immediately after thenth bounce.

Answers: 2

Предмет

Physics, 10.07.2019 18:20, megamorph

At a certain plane in space, the particle flux density is isotropic for 0 ws1 and zero for negative w, where w is the cosine of the angle made by the particle direction and a normal to the plane of reference. in that plane, what is (a) jn (w), the angular distribution of the flow rate, and (b) jt, the flow rate for all positive w?

Answers: 2

Do you know the correct answer?

Neutrons emerge from a plane surface into a vacuum with an angular flow rate proportional to the squ...

Questions in other subjects:

Konu

Mathematics, 28.05.2021 09:00

The ratio of the measurement of an angle to its complement is 1: 2. Find the measurement of the angle and it’s complement.

Konu

Mathematics, 28.05.2021 09:00

Help please i don’t understand ...

Konu

Mathematics, 28.05.2021 09:00

Which graph below shows a line that contains ordered pairs that are solutions of the equation shown? y = –x + 4

Konu

Mathematics, 28.05.2021 09:00

1. Alex puts up a tent. The outer wall is 9 feet tall. A support rope is attached, making 46° with the floor. How many feet from the base of the tent is the support rope attached...

Konu

Geography, 28.05.2021 09:00

Why is southeast asia sometimes called indochina?...

Konu

Mathematics, 28.05.2021 09:00

PLEASE HELP For part B it’s asking me to compare and contrast g(x) and h(x) vertex, x and y intercepts, max or min, vertical stretch/shrink I don’t know how to determine that

Konu

Mathematics, 28.05.2021 09:00

What is 7 2/3 + 10 3/5...

Konu

Mathematics, 28.05.2021 09:00

the perimeter of a quadrilateral is 59 in. The longest side is four times as long as the shortest side. the other tow side are equally long and are 5 in longer than the short side....

Konu

History, 28.05.2021 09:00

The development of railroads and canals led to... lower shipping costs. higher shipping costs. war with Mexico. the Civil War....

Konu

Mathematics, 28.05.2021 09:00

Jordan’s Cat Fern is a finicky eater. Jordan is trying to determine which of two brands of canned cat food Fern prefers....

Other tasks in the category: Physics More task