Physics Physics Practice Problems Solutions Library

# Uncertainty Solutions Library

Access 14 Uncertainty video and text solutions to help you complete your homework.

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14 solutions

Uncertainty

#### Q. Use the energy and its uncertainty to determine which transitions (from initial energy level ni to nf) your data is consistent with. 1. Ef = 1.89e-...

Solved • Dec 4, 2020

Uncertainty

#### Q. Lunar astronauts placed a reflector on the Moon’s surface, off which a laser beam is periodically reflected. The distance to the Moon is calculated...

Solved • Jul 16, 2020

Uncertainty

#### Q. Express your answers to problems in this section to the correct number of significant figures and proper units.The length and width of a rectangula...

Solved • Jul 13, 2020

Uncertainty

#### Q. In my lab, our measured magnetic field was B = 0.393 T.With this, calculate the uncertainity in the measured magnetic field. The earth's magnetic f...

Solved • Apr 21, 2020

Uncertainty

#### Q. The cubit is an ancient unit of length based on the distance between the elbow and the tip of the middle finger of the measurer. Assume that the di...

Solved • Oct 23, 2019

Uncertainty

#### Q. A watch manufacturer claims that its watches gain or lose no more than 8 seconds in a year. How accurate is this watch, expressed as a percentage?

Solved • Oct 29, 2018

Uncertainty

#### Q. What roughly is the percent uncertainty in the volume of a spherical beach ball whose radius is r = 0.84 ± 0.04 m?

Solved • Oct 29, 2018

Uncertainty

#### Q. Time intervals measured with a stopwatch typically have an uncertainty of about 0.2 s due to human reaction time at the start and stop moments. Wha...

Solved • Oct 29, 2018

Uncertainty

#### Q. If a train travels 891 km from Berlin to Paris and then overshoots the end of the track by 13 m, (a) what is the percentage error in the total dist...

Solved • Oct 29, 2018

Uncertainty

#### Q. The radius of a uniform solid sphere is measured to be (6.50 ± 0.20) cm and its mass is measured to be (1.85 ± 0.02) kg. Determine the density of t...

Solved • Oct 29, 2018

Uncertainty

#### Q. How many significant figures are in the following numbers? (a) 78.9 ± 0.2 (b) 3.788 × 109 (c) 2.06 × 1026 (d) 0.0053

Solved • Oct 29, 2018

Uncertainty

#### Q. A calculator displays a result as 1.365 248 0 × 107 kg. The estimated uncertainty in the result is ±2%. How many digits should be included as signi...

Solved • Oct 29, 2018

Uncertainty

#### Q. American football uses a field that is 100 yd long, whereas a regulation soccer field is 100 m long. Which field is longer, and by how much (give y...

Solved • Sep 24, 2018

Uncertainty

#### Q. What is the percent uncertainty in the measurement 2.58 ∓ 0.15 cm?A) 5.8 %B) 8.7 %C) 12 %D) 2.9 %

Solved • Jan 18, 2017