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Exam-1-08

# Exam-1-08 - LAST NAME First name and initial DO NOT OPEN...

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Problem 1 An electron is accelerated to a speed 0.99999 c (five 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) 1.2 × 10 -24 kg . m/s C) 1.2 × 10 -20 kg . m/s D) 1.6 × 10 -21 kg . m/s E) 6.0 × 10 -20 kg . m/s Problem 2 If an object moves at constant velocity, you can irrefutably conclude that: A) The object does not obey laws of physics B) The object certainly does not interact with anything in the universe C) The object may be interacting with other objects in the universe, but the net interaction is zero D) The net interaction with other objects in universe may be not zero, but it is constant in time
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Exam-1-08 - LAST NAME First name and initial DO NOT OPEN...

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