Precision v accuracy - Study guides, Class notes & Summaries

Edexcel IGCSE Physics, question and answer average speed = distance / time v = d / t Standard Unit for mass (m) kilogram (kg) Standard Unit for distance (d) or displacement (s) metre (m) Standard Unit for speed (s) or velocity (v) metre/second (m/s) Standard Unit for acceleration (a) metre/second² (m/s²) Standard Unit for Force (F) Newton (N) Standard Unit for time (t) Second (s) Standard Unit for gravitational field strength (g) ...

CHEM 120 Exam 1 | Questions and Correct Answers | Latest Update 2024/2025 | 100% Pass Celsius formula - Answer -C= (F-32)/1.8 Kelvin formula - Answer -K=C+273.15 density formula and units - Answer -D (g/mL, g/L, Kg/m^3)= M (kg) / V (m^3, cm^3, L , mL) Precision - Answer -a measure of how close a series of measurements are to one another Accuracy - Answer -how close a measurement is to the true value Law of Conservation of Energy - Answer -En

In Atomic Spectra lab, Vernier angles (V) in degrees of a Hg-lamp has a linear dependence on wavelength (λ) in nm of line spectra: V = 0.146 λ−10.85 a) Predict the Vernier angle in degree for a line that has a wavelength of 510 nm. b) If a student found a line at a Vernier angle of 76.5°, what is the wavelength in nm of this line? - Answer- a) 63.61 b) 598.288 Best-fit line equation commonly takes "y=mx+b" format. What are y, x, m and b? - Answer- y = y-value x= x-value m = slope ...

Abrasive Blasting - A technique used to clean and prepare a suface for further processing. Surfaces are blasted with pressurized abrasives such as sand, aluminum oxide, or silica carbide. Hazard dust inhalation (silicosis), high noise. Accuracy - The closeness of a measured value to the true or accepted value. ACFM - The actual CFM measures gas flowing at a particular defined temp and pressure ACH - Air Changes - The rate of exchange of air in a region or facility measured on an hourly basi...

Logarithm - is the exponent of base 10 that equals the value of a number In decibel formulas how should values be logically arranged when comparing two numbers (V1 / V2) - If you expect a gain, place the higher number first. If you expect a loss, place the smaller number first. Explain negative decibel values - measurement just means "less than before," or in this case, "less than the reference level. It does not mean the basic unit it represents has a negative value Decibel - describes...

Chapter 01 - Basic Concepts of Chemistry 1. A hypothesis is a ________. a. well-tested unifying principle that explains a body of facts b. setofexperimentsdesignedtotestatheory c. tentative explanation or predication based upon experimental observations d. setofquantitativedata e. concise statement of behavior that is always the same under the same conditions ANSWER: POINTS: HAS VARIABLES: TOPICS: NOTES: c 1 True 1.1 Chemistry and Its Methods Dynamic Question 2. All of the followi...

Clinical Chemistry Exam 1 Latest Update Graded A Accuracy The closeness with which a measurement comes to the true value Precision The degree of reproducibility in the measurement of a substance Mean Sum of all of a set divided by the number in the set (average) Median The point on the scale that has equal number of observations above and below (even number, take the two-center numbers add and divide by 2) Mode The value in a set that occurs most frequently Norm. Distribution The theoretica...

CHEM 121 LAB FINAL EXAM QUESTIONS WITH ALL POSSIBLE SOLUTIONS ANSWERED 2024/2025 When using the Tare function on a balance, start by (1). Then (2) to cancel out that mass. Finally, (3) and record the mass of your sample. 1) Placing the glassware on the balance 2) Press the Tare/Zero button 3) Add your sample to the glassware 5.43 g A balance with ±0.01 g tolerance 1.230 g A balance with ±0.001 g tolerance 4.0000 g A balance with ±0.0001 g tolerance A graduated cylinder contains 1...

HFRGWho wrote HFRG - correct answer Bruce K Siddle Officers are required to act..... - correct answer Professional, Proportional, and Precise Dynamic events have several things in common... (4 bullets) - correct answer 1.Usually over in seconds onmental conditions are never the same trigger Cortisol which inhibits consolidation of memory er strong emotions which makes memories bias/lack subjectivity Two important US Supreme Court decisions for Operational Environment... - correct an...

Chemical Change Change in Chemistry New Compound Formed Cannot be Changed Back Physical Change Change in Appearance No Change in Chemistry Can be changed back easily Qualitative Observations Observations about apperance physical features Quantitative Observations Measurements, Numbers Smaller Prefixes Deci 10 (-1) Centi 10(-2) Milli 10(-3) Micro 10(-6) Nana 10(-9) Pico 10(-12) Larger Prefixes Deca 10(1) Hecto 10(2) Kilo 10(3) Mega 10(6) Giga...