Exam-1-11

# Exam-1-11 - LAST NAME First name and initial DO NOT OPEN...

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Problem 1 An electron is accelerated to a speed 0.9999 c (four 9’s), where c =3 × 10 8 m/s is the speed of light. What is the momentum of this electron? Mass of an electron is 9 × 10 -31 kg. A) 2.7 × 10 -22 kg . m/s B) 1.9 × 10 -20 kg . m/s C) 3.8 × 10 -24 kg . m/s D) 3.8 × 10 -20 kg . m/s E) 1.6 × 10 -21 kg . m/s Problems 2-3: The mass of a student sitting in the bus is 70 kg. The bus is traveling at speed 55 mph in respect to the road (1 mile = 1600 meters). Problem 2 What is the magnitude of momentum of this student in the reference frame in which the road is at rest (i. e. in respect to the road)? A)
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## This note was uploaded on 11/02/2009 for the course PHYS 172 taught by Professor ? during the Spring '08 term at Purdue.

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Exam-1-11 - LAST NAME First name and initial DO NOT OPEN...

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