wanted to understand, what is efficiency in thermodynamics?
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Briefly explain what changing the gravitational force will do to friction on level ground. Why does this happen? How will this change on a hill?
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what is action integral?What is it for?(In the calculation of variation)
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Q5. Report the slope and uncertainty in the slope of the linear fit on your graph, include the correct units. Q6. Use your reported slope from the graph to calculate the spring constant k, and include the correct units. Show all work. Q7. Using propagation of uncertainties, it can be shown that the uncertainty in the spring constant k may be calculated using Using your graph for the uncertainty in the slope, along with your answer to Q6, calculate the uncertainty in the spring constant. Show all work.
m=2.14 +- 0.46, b=-0.0074+-0.0097, r=0.937. The graph wouldn't upload.
| T^2 (s^2) | Weight k(g) |
| 0.0016 | 0.1 |
| 0.0025 | 0.15 |
| 0.0036 | 0.2 |
| 0.0036 | 0.25 |
| 0.0064 | 0.3 |
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A 11 g circular annulus of outer radius 47 cm and inner radius
35.2 cm makes small oscillations on an axle through its outer edge
perpendicular to its face.
(a) Find its frequency of oscillation.
(b) Find the frequency of oscillation of a thin ring of the same
outer radius and mass.
(c) Find the frequency of oscillation of a solid disc of the same
outer radius, thickness, and density.
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Consider a cylindrical capacitor made out of two "long" metal cylindrical shells of length L. The outer one has a radius R and the inner one has a radius r. Now Q Coulombs of charge are removed from the outer cylinder and moved to the inner cylinder.
-Using Gauss's Law, derive an expression for the field in the gap between cylindrical shells. Please state the
symmetry argument clearly as well as choice for Gaussian surface used and why.
-Now that you have the field, take a unit positive charge for a "walk" from one cylinder to the other and find the work done,
and thus calculate the capacitance of the cylindrical capacitor.
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A stone is dropped from a bridge. A second stone is thrown downwards 2.0 s later with an initial speed of 25 m/s. They both reach the water below at the same instant. (a) How long did it take for the first stone to reach the water? (b) How high is the bridge? (c) What are the speeds of the two stones just before they hit the water?
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If energy is always conserved, how can some devices be more
efficient then others?
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Explain in detail how battery size, chemical properties, age, and temperature as well as any other factors that you may think of, cause internal resistance with in a battery
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1. A one-electron atom has atomic number ?, mass number ? and a
spherical nucleus of radius ? . Assume electric charge +?? is
uniformly distributed throughout the volume of
the nucleus. Ignoring spin, use first order non-degenerate
perturbation theory and the
hydrogenic wave functions adapted to the one-electron atom to
determine the dependence
of the ground state energy of the atom on ?
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Two identical blocks of mass M = 2.60 kg each are initially at rest on a smooth, horizontal table. A bullet of very small mass m = 20 g (m << M) is fired at a high speed v. = 120 m/s towards the first block. It quickly exits the first block at a reduced speed of 0.40 v, then strikes the second block, quickly getting embedded inside of it. All the motion happens on the x-axis.
(a) find the speeds of the two blocks after their encounters with the bullet.
(b) Now the first block catches up with the second one and collides with it. They got stuck together afterward and move forward. Find their common speed V after the collision.
(c) The two blocks now hit a light spring of spring constant k = 35 N/m mounted on the wall. How far is the spring compressed before the blocks reach a momentary stop?
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An n-type silicon wafer undergoes a pre-deposition diffusion process with a constant surface concentration of boride gas; the resulting concentration of boron in silicon at the surface is estimated to be 1x1018 atoms cm-3. The background concentration of trace boron atoms in the silicon wafer is estimated to be 1x1014 cm-3. (A) Estimate the depth of the p-n junction below the surface when the background doping concentration of the n-type impurity is 3.45 x1016 cm-3; assume the diffusion process proceeds for 10 minutes and has a diffusion parameter given by 10-12 cm2 s -1. (B) Estimate the number of boron atoms (per cm^2) introduced in this thin surface layer following the pre-deposition step.
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Can anyone walk me through this please!!-- Build a Monte Carlo simulation model to solve a project problem.
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