Io = axial intensity w = beam waist (i.e. 1/e^2 radius) at r= w, I(r) is at 1/e^2 (13.5%) of the axial intensity...
Laserpointer Points:1 A laserpointer has a beam intensity of 54 W/m2 and a beam radius of 2 mm. A first grader attempts to use it to move a black toy car. Assuming perfect absorption, what is the force on the car? 9.04*10A-12 N Incorrect. Tries 4/12 Previous Tries Submit Answer Send Feedback Post Discussion
Fluid Mechanics #1 Laminar Flow in Pipes The axial velocity in a pipe of radius R is given by, . Find the value of r (as a fraction of R) that maximizes u(r). How does this value of velocity compare with Vc? Compute the wall shear stress, du or Perform a control volume analysis on a pipe section of length e. Relate the pressure drop across the pipe section to the shear stress. Substitute the relation above for tw to...
06M.3 Suppose we prepare a beam of photons with wave- length λ and intensity I whose spin angular momentum vectors are aligned with their direction of motion, and we allow these photons to fall on a circular metal plate of mass M and radius R that is free to rotate around an axis per- pendicular to the plate and parallel to the beam of light. As the photons are absorbed by the metal plate, the plate will have to rotate...
2 1 0 T" A(1/r)dA=b-In(r/r The figure (not drawn to scale) shows a curved I-beam of given section and inner radius subjected to a bending moment. Given Sections parameters w 12 mm, h 115 mm, w85mm and he 21 mm, Inner radlus Ro320 mm, and bending moment M 850 MPa Calculate the radius of curvature at the beam's section centroid F, the radius of curvature at the neutral axis R and the stress at point Bop 2 1 0 T"...
Problem 4. At one end of an elastic beam (length 2L, annular cross section with outer radius R, inner radius r, and planar moment of inertia z(R4- that is supported by a truss structure (cross-sectional area A), a vertical load P is applied, which results in a vertical deflection at that point that can be determined by 5PL 2PL3 EA 3EIz Two experiments with the same data but different inner radii r were conducted, and the deflections w were measured....
certain beam of light has an intensity of 2,000 W/m2 and a wavelength of 500 nm. If the beam is of sufficient diameter to ill uminate a 1.00-m2 area, how many photons does i detiver to that area uingch second? a. 5 x 1021 b. 1 x 1021 c. 3 x 1022 d. 2 x 1022 e. 4 x 1023
1)- Give the correct names for the structures drawn (i.e. A-E) or draw the structure for each of the names given (i.e., F) for the compounds below, and use the E/Z, cis/trans, equatorial/axial, R/S labeling when appropriate (Choose 4 overall which include A and E) он O2N NO2 CN NO2 Br Common Name (CH,)-СОНСОН(CH3)2 Common Name 4-Carbomethoxy-5-formyl-2-hydroxybenzenesulfonic acicd 1)- Give the correct names for the structures drawn (i.e. A-E) or draw the structure for each of the names given (i.e.,...
2. [40 pts] Gaussian Beam (Based on Textbook problem 1.4 and 1.5) A diode laser emits a Gaussian beam. The minimum waist diameter is 1 mm. The lasing wavelength is 514 nm. Find (a) Divergence angle 6div (b) The Rayleigh range (c) The diameter of the beam after propagating 10 m (d) 10 m away from the laser output aperture, you want to place a spherically curved mirror to reflect 1.0 mmthe beam back perfectly. Find the radius of curvature...
2. The governing differential equation that relates the deflection y of a beam to the load w ia where both y and w are are functions of r. In the above equation, E is the modulus of elasticity and I is the moment of inertia of the beam. For the beam and loading shown in the figure, first de m, E = 200 GPa, 1 = 100 × 106 mm4 and uo 100 kN/m and determine the maximum deflection. Note...
Consider the Laplace equation for a ball of radius R described in spherical coordinates (r, 0) 2 1 cot 72 0= n where is the zenith angle and assume u is independent on the azirnuth angle d. a) By separation of variables, derive two ordinary differential equations of r and w:= cos e given by 2 F" (r) +2rF (r) - n(n + 1) F, (r) = 0, (1 w2)G (w) - 2wG", (w) +n(n +1)G, (w) 0. (n 0,1,2,....