Discuss the “Great Debate” that took place between Harlow Shapley and Heber Curtis in 1920. (a) What were the major arguments on each side of the question of whether the spiral nebulae were Galactic (in the Milky Way) or extragalactic (outside the Milky Way)? (b) Briefly outline how Shapley estimated the size of the Milky Way.
In: Physics
use python to graph the projectile motion of an object under quadratic drag
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please give me a detailed information of Electron
Diffraction and SAED ( selected area electron diffraction)
technique with the help of examples? Why we use SAED
technique?
Details required for both are as follows:
-Definition
- difference between SAED and electron diffraction
-instrumentation
-purpose with elaborated examples
-advantages
-limitations
-applications
Thanks in advance.
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a) Consider three common types of phonon spectroscopy, Raman spectroscopy, Brillouin spectroscopy and inelastic neutron scattering. Describe the differences between the three techniques in terms of the following variables and comment briefly on the limitations of each technique as a consequence of these differences.
i) The phonon wavevector range probed by each technique.
ii) The range of energy transfers to be probed by each technique.
iii) The momentum (wavenumber) resolution of each technique.
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Describe the reason, why or why not the emittance is different in the horizontal plane and the vertical plane
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Find the electric field inside and outside of hallow conducting sphere charge Q
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Two 10-cm-diameter charged rings face each other, 19 cm apart. The left ring is charged to -30 nC and the right ring is charged to +30 nC .
Part A
What is the magnitude of the electric field E⃗ at the midpoint between the two rings?
Express your answer to two significant figures and include the appropriate units.
Part B
What is the direction of the electric field E⃗ at the midpoint between the two rings?
What is the direction of the electric field at the midpoint between the two rings?
| - | To the left ring. |
| - | To the right ring. |
| -Parallel to the plane of the rings. |
Part C
What is the magnitude of the force F⃗ on a -1.0 nC charge placed at the midpoint?
Express your answer to two significant figures and include the appropriate units.
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a 25.0-kg boy stands 200 m from the center of a
frictionless playground merry-go
round, which has a moment of inertia of 200. kgm. The boy begins to
run in a circular path
with a speed of 0.600 m/s relative to the ground .a)Calculate the
angular velocity of the merry-go-round
b)Calculate the speed of the boy relative to the surface of the
merry -round
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How wind force affect projectile velocity?
what is the equation of projectile motion velocity x & y with
wind force effect?
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Generally speaking, a system undergoes simple harmonic motion if there is a restoring force that increases linearly with displacement from equilibrium. In the discussion, describe how a pendulum and a mass on a horizontal spring satisfy those conditions (ignore any friction forces); also, include another example of a real world system that undergoes simple harmonic motion and discuss how it satisfies the conditions mentioned above. Finally, be sure to respond to at least two of your peers’ discussion posts.
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| angel of incedence | angle of reflection | average angle of reflection | ||||
| clockwise | counterclockwise | |||||
| 10 | 10 | 10 | 10 | |||
| 20 | 20 | 20 | 20 | |||
| 30 | 30 | 30 | 30 | |||
| 40 | 40 | 40 | 40 | |||
| 50 | 50 | 50 | 50 | |||
| 60 | 60 | 60 | 60 | |||
| 70 | 70 | 70 | 70 | |||
| 80 | 80 | 80 | 80 | |||
| acrylic lens | Glass lens | |||||
| angel of incedence | angle of reflection | average angle of reflection | angle of reflection | average angle of reflection | ||
| clockwise | counterclockwise | clockwise | counterclockwise | |||
| 10 | 8 | 5 | 6.5 | 7 | 7 | 7 |
| 20 | 15 | 12 | 13.5 | 13 | 13 | 13 |
| 30 | 21 | 18 | 19.5 | 20 | 20 | 20 |
| 40 | 27 | 25 | 26 | 25 | 25 | 25 |
| 50 | 32 | 30 | 31 | 31 | 31 | 31 |
| 60 | 37 | 35 | 36 | 35 | 35 | 35 |
| 70 | 40 | 38 | 39 | 38 | 38 | 38 |
| 80 | 43 | 40 | 41.5 | 40 | 40 | 40 |
| acrylic | glass | unknown fluid |
| Slope from the graph | Slope from the graph | Slope from the graph |
| index of refraction n= | index of refraction n= | index of refraction n= |
| %error= | %error= | %error= |
| critical angle | critical angle | critical angle |
| index of refraction n= | index of refraction n= | index of refraction n= |
| %error= | %error= | %error= |
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Jupiter has a mass of 1.9*1027 kg and a radius of 69,900 km. G = 6.67*10-11 Nm2 /kg2 a. Find the acceleration due to gravity at its surface b. Find the speed of a satellite orbiting at a height of 10,000 km above its surface c) Find the cetripetal acceleration of the satellite
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A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the galactic center is receding from the earth at a relative speed of uG = 2.00 × 106 m/s. Relative to the center, the tangential speed is vT = 0.380 × 106 m/s for locations A and B, which are equidistant from the center. When the frequencies of the light coming from regions A and B are measured on earth, they are not the same and each is different from the emitted frequency of 5.077 × 1014 Hz. Find the measured frequency for the light from (a) region A and (b) region B. (Give your answer to 4 significant digits. Use 2.998 × 108 m/s as the speed of light.)
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How much 1.0 mm diameter copper wire would it take to equal the resistance of one 100 Ω resistor? The resistivity of copper is 1.68*10-8 Ωm
b) What would be the current if this wire was connected to a 12.0 V battery?
c) How many electrons per second pass by a point on the wire?
d) If this wire was coiled up and submerged in 100 mL of water at 20oC, how long would it take for the water to boil? CH2O = 4186 J/kgC
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