Physics, 04.02.2020 10:59 emmapizano
Carry out the integration of eq. 14.7 in landau for u = -a/r. use the substitution u = 14.7 and show that u = (e/p) cos +(1/p) solves the integral. find p and e in terms of m, u, a and e. hint: multiply the numerator and denominator by r2 21. use p/r e cos 1 and your results from exercise 20 to show that e > 0 corresponds to a hyperbola e 0 corresponds to a parabola, and e < 0 corresponds to an ellipse. 22. there are plenty of asteroids flying around in the universe. for an asteroid coming from infinity with velocity v find the effective total cross-section for the asteroid to hit the earth (due to the gravita tional attraction between them). you can assume that the asteroid is much smaller than the earth what happens in the limit v = 0o? interpret the result hint: treat this as a scattering problem with the asteroids all moving in the same direction (as in a beam of particles), and compute the maximum impact factor for an asteroid to hit the earth, bmax the cross-section is then o = tb max
Answers: 3
Physics, 22.06.2019 03:30
The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared
Answers: 1
Physics, 22.06.2019 07:10
Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?
Answers: 2
Physics, 22.06.2019 09:30
This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer
Answers: 2
Carry out the integration of eq. 14.7 in landau for u = -a/r. use the substitution u = 14.7 and show...
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