The uncertainty in the velocity of an electron is 25 × 103 m/s. What isthe uncertainty in its position?Please give your answer in units of mm, accurate to two decimal places.Answer: A particular radioactive material was weighed exactly 1 year ago,showing a mass of 200 g. If the mass was measured today, showingonly 7.1 g remaining, calculate the half-life of the radioactive material.Please give your answer in units of days, rounded to the nearest day.

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the uncertainty in its position? Please give your answer in units Answer:

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter1: Physics And Measurement

Section: Chapter Questions

Problem 1.10OQ: A calculator displays a result as 1.365 218 0 X 107 kg. The estimated uncertainty in the result is...

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.

Question

The uncertainty in the velocity of an electron is 25 × 103 m/s. What is
the uncertainty in its position?
Please give your answer in units of mm, accurate to two decimal places.
Answer:

A particular radioactive material was weighed exactly 1 year ago,
showing a mass of 200 g. If the mass was measured today, showing
only 7.1 g remaining, calculate the half-life of the radioactive material.
Please give your answer in units of days, rounded to the nearest day.

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