4 In projection television sets electrons are accelerated through a potential difference of 50kV. • Calculate the speed of the electrons using the relativistic form of kinetic energy assuming the electrons start from rest. (Rest energy of electron is 0.511MeV) • Calculate the speed of the electrons using the classical form of kinetic energy. o Determine the difference percentage and is this difference in speed significant in the design of this TV set?

4 In projection television sets electrons are accelerated through a potential difference of 50kV. • Calculate the speed of the electrons using the relativistic form of kinetic energy assuming the electrons start from rest. (Rest energy of electron is 0.511MeV) • Calculate the speed of the electrons using the classical form of kinetic energy. o Determine the difference percentage and is this difference in speed significant in the design of this TV set?

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

Relativistic Energy and Momentum

According to classical physics, time flow is the same for every observer. But according to einstein's theory, time flow is different for different observers. The idea that time flow is not the same for all may sound strange because we may not experience this effect in everyday life. This effect is only observed when an object moves with some velocity comparable to the velocity of light. This velocity is termed relativistic velocity.

Question

4 In projection television sets electrons are accelerated through a potential difference of 50kV.
• Calculate the speed of the electrons using the relativistic form of kinetic energy
assuming the electrons start from rest.
(Rest energy of electron is 0. 511MEV)
• Calculate the speed of the electrons using the classical form of kinetic energy.
o Determine the difference percentage and is this difference in speed significant in the
design of this TV set?
The free neutron is known to decay into a proton an electron and an antineutrino (of zero

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Example 6 Bob, who is stationary, measures the length of a moving relativistic train and finds out 50 m. The train passes through a tunnel of length 25 m at a speed 0.5c. Place on a space-time (Minkowski) diagram the following events: (a) Event A: the front of train at the exit of the tunnel. (b) Event B: the front of the train at the entrance of the tunnel. (c) Event C: the rear of the train at the exit of the tunnel. (d) Event D: the rear of the train at the entrance of the tunnel.