Physics OCR A level Module 2 Flashcards 0.0 / 5 ? PhysicsFoundations of PhysicsASOCR Created by: Bananaexcel 2.0Created on: 22-12-18 13:47 What is a (T) Tera? x10^12 1 of 24 What is a (G) Giga? x10^9 2 of 24 What is a (M) Mega? x10^6 3 of 24 What is a (k) Kilo? x10^3 4 of 24 What is a (d) Deci? x10^-1 5 of 24 What is a (c) Centi? x10^-2 6 of 24 What is a (m) Milli? x10^-3 7 of 24 What is a (μ ) Micro? x10^-6 8 of 24 What is a (n) Nano? x10^-9 9 of 24 What is a (p) Pico? x10^-12 10 of 24 Define 'accuracy' of a result How close the quantity of the measured value is to the true value. 11 of 24 Define 'precision' of a result If the results in an experiment are close together and have a small range. 12 of 24 What is a systematic error? An error that does not happen by chance but by an inaccuracy in the apparatus used. 13 of 24 What is a zero error? An error that occurs when the apparatus shows a non-zero value when it should be registering zero. 14 of 24 What is a parallax error? An error produced when the scale, gauge or pointer is observed wrongly during the experiment due to position of viewing and perception. 15 of 24 What is a random error? An error caused by unknown changes to the apparatus or conditions. 16 of 24 What is resolution? The smallest change in a quantity that an instrument can measure. 17 of 24 What is an absolute uncertainty? The size of the range of values in which the 'true value' of the measurement probably lies. 18 of 24 If y=ab how is the %uncertainty calculated? a% + b% 19 of 24 if y=a/b how is the %uncertainty calculated? a% + b% 20 of 24 if y=a^n how is the %uncertainty calculated? n*a% 21 of 24 How to find the percentage difference between experimental and true values? (Experimental value - Accepted value/Accepted value)*100 22 of 24 What is a scalar quantity? A quantity that only has magnitude. 23 of 24 What is a vector quantity? A quantity that has both magnitude and direction. 24 of 24
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