Week 5 RES/ 341 Chapter Exercises: 7.54 The fracture strength of a certain type of manufactured glass is normally distributed with a mean of 579 MPa with a standard deviation of 14 MPa. (a) What is the probability that a randomly chosen sample of glass will break at less than 579 MPa? (b) More than 590 MPa? (c) Less than 600 MPa? (Data are from Science 283 [February 26, 1999], p.
* Trial 1 37.00(g) – 26.10(g) = 10.90(g) * Trial 2 36.70(g) – 26.15(g) = 10.55(g) * Trial 3 36.10(g) – 26.05(g) = 10.05(g) 2. Calculate the density of the unknown liquid for each trial. (Divide the mass of the liquid calculated above by the volume of the liquid.) * Trial
A 1 cent B 2 cents C 19 cents D $1.90 7 2 17 Find % --& . # 8$ 765 A ----------1000 49 C ----64 14 B ----16 14 D ----64 1 NEW CENTURY MATHS 9: STAGES 5.2/5.3 © Nelson Australia Pty Ltd 2004 This page may be photocopied for educational use within the purchasing institution Topic test 1:
Determine the number of moles of argon and the mass in the sample. 9. A 30.6 g sample of gas occupies 22.4 L at STP. What is the molecular weight of this gas? Think about it!!!!!
7) Add 3 drops of phenolphthalein indicator to solution. 8) Titrate the KHP solution against the NaOH solution to be standardized. Titrate until faint pink colour appears (pink colour will only last about 30secs) 9) Repeat titration several times until precise values are obtained. 10) Calculate average molarity of NaOH. (within 1%
What are the impacts of a Tsunami and why do these impacts vary? A tsunami is a wave of water, higher than a house but is very disruptive it can smash a full island apart. The Japan Tsunami happened on 11th march 2011 it was a magnitude of 8.9 on the Richter scale. The Richter scale is a numerical value used to measure the power of earthquakes. “It is a logarithmic scale based on the amplitude of waves recorded by a seismograph this means that each whole number increase on the scale corresponds to an absolute increase by a factor of ten.
SL Probability 1 IB Exam Questions Worksheet 1 SL Probability 1 IB Exam Questions 1. The following probabilities were found for two events R and S. P( R) = a) 1 4 1 , P(S | R) = , P(S | R ' ) = 3 5 4 Copy and complete the tree diagram on the right. b) Find the following probabilities. i) ii) iii) P( R∩S ) . P( S ) .
The ingredients of Sweet'N Low are dextrose, 3.6% soluble saccharin, and small amounts of anti-caking agents. Ten grams of Sweet'N Low contain approximately 9 g of dextrose and provide 36 calories. The same weight of sugar provides 39 calories (Zamora, 2011). Aspartame is 200 times sweeter than natural sugar and
Date, Time (local), Duration, Include the sequence of events to show the speed of onset and the pace of management and recover The earthquake in L’Aquila took place at 3.32am on Monday the 6th of April 2009. The earthquake lasted for approximately 14 seconds. The epicenter was in Tornimparte, Abruzzo, which is 7 km northwest of the town of L’Aquila. The depth of the earthquake was approximately 8.8 km. There were more than a dozen aftershocks, felt over a period of two days.
Measuring Acid Rain The acidity of any solution is measured on a potential hydrogen (pH) scale numbered from zero to 14, with a pH value of seven considered neutral. Values higher than seven are considered more alkaline or basic (the pH of baking soda is eight); values lower than seven are considered acidic (the pH of lemon juice is two). The pH scale is a logarithmic measure. This means that every pH change of one is a ten-fold change in acid content. Therefore, a decrease from pH seven to pH six is a ten-fold increase in acidity; a drop from pH seven to pH five is a 100-fold increase in acidity; and a drop from pH seven to pH four is a 1,000-fold increase.