A Read aloud | DrawHighlight vclock be compared with the Earth-based clock?12. A moving rod is observed to have a length of l = 2.00 m and to be oriented at an angleof 0 = 30.0° with respect to the direction of motion as shown in the figure. The rod has aspeed of 0.995c. (a) What is the proper length of the rod? (b) What is the orientation anglein the proper frame?Direction of motion13. The total energy of a proton is twice its rest energy. Find the momentum of the proton inMeV/c units.14. The rest energy of an electron is 0.511 MeV. The rest energy of a proton is 938 MeV.Assume both particles have kinetic energies of 2.00 MeV. Find the speed of (a) the electronand (b) the proton. (c) By what factor does the speed of the electron exceed that of theproton? (d) Repeat the calculations in parts (a) through (c) assuming both particles havekinetic energies of 2000 MeV.15. What is the longest-wavelength EM radiation that can eject a photoelectron from silver,given that the binding energy is 4.73 eV? Is this in the visible range?16. What is the maximum kinetic energy in eV of electrons ejected from sodium metal by 450-nm EM radiation, given that the binding energy is 2.28 eV?17. Photoelectrons from a material with a work function of 2,71 eV are ejected by 420-nmnhotens Once ciected hou long does it talke these elestroneto trvel 2 50.cmtea detestiono searchDIGPause Br0%&4.8DG

Answered: Image /qna-images/answer/ffdd646c-580d-4ac2-a699-bae5a1077094.jpg

12. A moving rod is observed to have a length ofl = 2.00 m and to be oriented at an angle of 6 = 30.0° with respect to the direction of motion as shown in the figure. The rod has a speed of 0.995c. (a) What is the proper length of the rod? (b) What is the orientation angle in the proper frame? %3D %3D Direction of motion

12. A moving rod is observed to have a length ofl = 2.00 m and to be oriented at an angle of 6 = 30.0° with respect to the direction of motion as shown in the figure. The rod has a speed of 0.995c. (a) What is the proper length of the rod? (b) What is the orientation angle in the proper frame? %3D %3D Direction of motion

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.

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A Read aloud | Draw
Highlight v
clock be compared with the Earth-based clock?
12. A moving rod is observed to have a length of l = 2.00 m and to be oriented at an angle
of 0 = 30.0° with respect to the direction of motion as shown in the figure. The rod has a
speed of 0.995c. (a) What is the proper length of the rod? (b) What is the orientation angle
in the proper frame?
Direction of motion
13. The total energy of a proton is twice its rest energy. Find the momentum of the proton in
MeV/c units.
14. The rest energy of an electron is 0.511 MeV. The rest energy of a proton is 938 MeV.
Assume both particles have kinetic energies of 2.00 MeV. Find the speed of (a) the electron
and (b) the proton. (c) By what factor does the speed of the electron exceed that of the
proton? (d) Repeat the calculations in parts (a) through (c) assuming both particles have
kinetic energies of 2000 MeV.
15. What is the longest-wavelength EM radiation that can eject a photoelectron from silver,
given that the binding energy is 4.73 eV? Is this in the visible range?
16. What is the maximum kinetic energy in eV of electrons ejected from sodium metal by 450-
nm EM radiation, given that the binding energy is 2.28 eV?
17. Photoelectrons from a material with a work function of 2,71 eV are ejected by 420-nm
nhotens Once ciected hou long does it talke these elestroneto trvel 2 50.cmtea detestion
o search
DIG
Pause Br
0%
&
4.
8
D
G

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A 1 km spacecraft is racing towards the Sun at 0.75c. Using equations given in class, calculate the spacecraft length you measure from Earth. Treat Earth as not moving compared to the spacecraft's motion of 0.75 c.
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