Part A If the proton is fired at a speed of 4.8x107 m/s, what is its closest approach to the surface of the nucleus? Assume the nucleus remains at rest. Express your answer to two significant figures and include the appropriate units. da Value Submit Provide Feedback Request Answer - 0 Units ? Next >

Part A If the proton is fired at a speed of 4.8x107 m/s, what is its closest approach to the surface of the nucleus? Assume the nucleus remains at rest. Express your answer to two significant figures and include the appropriate units. da Value Submit Provide Feedback Request Answer - 0 Units ? Next >

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter30: Atomic Physics

Section: Chapter Questions

Problem 1PE: Using the given charge-to-mass ratios for electrons and protons, and knowing the magnitudes of their...

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Data from the appendices and the periodic table may be needed for these problems. Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to incandescence for long periods of time. Natural thorium is almost 100% 232Th.
Using the given charge-to-mass ratios for electrons and protons, and knowing the magnitudes of their charges are equal, what is the ratio of the proton's mass to the electron's? (Note that since the charge-to-mass ratios are given to only three-digit accuracy, your answer may differ from the accepted ratio in the fourth digit.)
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The brightest star in the sky is Sirius, the Dog Star. Itis actually a binary system of two stars, the smaller one (Sirius B)being a white dwarf. Spectral analysis of Sirius B indicates that itssurface temperature is 24 000 K and that it radiates energy at a totalrate of 1.0 · 1025 W. Assume that it behaves like an ideal blackbody.(a) What is the radius of Sirius B? Express your answer in kilometersand as a fraction of our Sun’s radius (R= 6.96 · 108 m). (b) Whichstar radiates more total energy per second, the hot Sirius B or the(relatively) cool Sun with a surface temperature of T = 5800 K? Tofind out, calculate the ratio of the total power radiated by our Sun tothe power radiated by Sirius B.
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Using the given charge-to-mass ratios for electrons andprotons, and knowing the magnitudes of their charges areequal, what is the ratio of the proton’s mass to the electron’s?(Note that since the charge-to-mass ratios are given to onlythree-digit accuracy, your answer may differ from theaccepted ratio in the fourth digit.)
A particle has γ=2,865. a) Calculate c-v in m/s. If your calculator gives problems, you might want to solve the appropriate equation for c-v or c(1 - v/c) and use an approximation. b) In the previous problem, in a race to the moon, by 3/4ths the distance, light is one or ten meters ahead of the particle. We routinely approximate mass as zero, gamma as infinite, and speed as the speed of light. ("Massless particles" -- gamma and m have to be eliminated from the expressions. Light is a true massless particle.) If a massless particle has momentum 2,910 MeV/c, calculate its energy in MeV.
Q. 1. What is the reason behind the glow in metals? How Plank’s formulated the energy in blackbody radiation emission?
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Use the fall-time associated with 1.5m to calculate g. What uncertainty would you assign to your calculated value of g? Explain your reasoning for assigning this value.