PES Skill Sheets.book - Capital High School

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Name: Date: 7.3 Efficiency In a perfect machine, the work input would equal the work output. However, there aren’t any perfect machines in our everyday world. Bicycles, washing machines, and even pencil sharpeners lose some input work to friction. Efficiency is the ratio of work output to work input. It is expressed as a percent. A perfect machine would have an efficiency of 100 percent. An engineer designs a new can opener. For every twenty joules of work input, the can opener produces ten joules of work output. The engineer tries different designs and finds that her improved version produces thirteen joules of work output for the same amount of work input. How much more efficient is the new version? Efficiency of the first design Efficiency of the second design work output Efficiency = work input 10 joules = 20 joules = 50% The second design is 15% more efficient than the first. work output Efficiency = work input 13 joules = 20 joules = 65% 1. A cell phone charger uses 4.83 joules per second when plugged into an outlet, but only 1.31 joules per second actually goes into the cell phone battery. The remaining joules are lost as heat. That’s why the battery feels warm after it has been charging for a while. How efficient is the charger? 2. A professional cyclist rides a bicycle that is 92 percent efficient. For every 100 joules of energy he exerts as input work on the pedals, how many joules of output work are used to move the bicycle? 3. An automobile engine is 15 percent efficient. How many joules of input work are required to produce 15,000 joules of output work to move the car? 4. It takes 56.5 kilojoules of energy to raise the temperature of 150 milliliters of water from 5 °C to 95 °C. If you use an electric water heater that is 60% efficient, how many kilojoules of electrical energy will the heater actually use by the time the water reaches its final temperature? 5. A power station burns 75 kilograms of coal per second. Each kg of coal contains 27 million joules of energy. a. What is the total power of this power station in watts? (watts = joules/second) b. The power station’s output is 800 million watts. How efficient is this power station? 6. A machine requires 2,000 joules to raise a 20. kilogram block a distance of 6.0 meters. How efficient is the machine? (Hint: Work done against gravity = mass × acceleration due to gravity × height.) 7.3
Name: Date: 7.3 Power In science, work is defined as the force needed to move an object a certain distance. The amount of work done per unit of time is called power. Suppose you and a friend are helping a neighbor to reshingle the roof of his home. You each carry 10 bundles of shingles weighing 300 newtons apiece up to the roof which is 7 meters from the ground. You are able to carry the shingles to the roof in 10 minutes, but your friend needs 20 minutes. Both of you did the same amount of work (force × distance) but you did the work in a shorter time. However, you had more power than your friend. Let’s do the math to see how this is possible. Step one: Convert minutes to seconds. Step two: Find power. W = F× d W = 10 bundles of shingles (300 N/bundle) × 7 m = 21,000 joules Work (joules) Power (watts) = Time (seconds) 60 seconds 10 minutes × = 600 seconds (You) minute 60 seconds 20 minutes × = 1,200 seconds (Friend) minute 21,000 joules = 35 watts (You) 600 seconds 21,000 joules = 17.5 watts (Friend) 1,200 seconds As you can see, more power is produced when the same amount of work is done in a shorter time period. You have probably heard the word watt used to describe a light bulb. Is it now clear to you why a 100-watt bulb is more powerful than a 40-watt bulb? 7.3
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Chapter and Section Chapter 1: Meas
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Chapter and Section Chapter 5: Forc
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Chapter and Section Chapter 9: Heat
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Chapter and Section Chapter 14: Cha
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Chapter and Section Chapter 18: Ear
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Chapter and Section Chapter 24: Wav
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Name: Date: 1.1 Lab Safety What can
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Page 3 of 6 Safety quiz 1. Draw a d
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Page 5 of 6 c. You suddenly you beg
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Name: Date: 1.1 Using Your Textbook
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Page 2 of 3 The following prefixes
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Name: Date: 1.1 Scientific Notation
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Page 3 of 3 3. Write the numbers in
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Page 2 of 4 Example 1: Measuring ob
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Page 4 of 4 4. . Prefix Symbol Mult
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Name: Date: 1.2 Reading Strategies
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Name: Date: 1.2 Stopwatch Math What
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Name: Date: 1.2 Understanding Light
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Name: Date: 1.2 Indirect Measuremen
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Name: Date: 1.3 Dimensional Analysi
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Name: Date: Skill Builder Fractions
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Page 3 of 4 Solving fraction proble
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Name: Date: 1.3 Significant Digits
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Page 3 of 4 Follow these steps for
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Name: Date: 1.3 Study Notes This sk
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Name: Date: 1.3 Science Vocabulary
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Page 3 of 3 Using the table of pref
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Page 2 of 2 5. Earth’s moon is co
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Page 2 of 3 When precise conversion
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Name: Date: 1.4 Creating Scatterplo
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Page 3 of 3 g. What is the position
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Page 2 of 2 1.4 1. Given the variab
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Page 2 of 3 Step 3: Look at the ran
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Name: Date: 1.4 Recognizing Pattern
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Page 3 of 3 Answer the following qu
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Page 2 of 2 4. Measurements: List a
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Page 2 of 2 2. Your teacher shows y
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Page 2 of 4 Recording valid observa
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Page 4 of 4 b. How did the student
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Page 2 of 3 Name: Lucy O. Date: Jan
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Name: Date: 2.2 Using Computer Spre
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Page 3 of 3 5. The following data i
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Page 2 of 2 2. John notices that hi
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Name: Date: 3.1 Latitude and Longit
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Page 3 of 4 Use an atlas or globe t
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Name: Date: 3.1 Map Scales Mapmaker
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Page 3 of 3 f. Point Q to Point M g
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Page 2 of 5 It’s time to go! 3.1
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Page 4 of 5 37. Now you will head t
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Name: Date: 4.1 Vectors on a Map Yo
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Page 2 of 3 1. Draw a profile map o
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Name: Date: 3.3 Bathymetric Maps Im
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Page 1 of 2 3.3 Tanya Atwater Tanya
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Name: Date: 4.1 Solving Equations w
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Page 3 of 4 Use the formula V = l
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Name: Date: 4.1 Problem Solving Box
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Page 2 of 3 In problems 6 and 7, yo
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Name: Date: 4.1 Percent Error When
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Page 3 of 3 1. The lab group conduc
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Page 2 of 3 1. A bicyclist travels
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Name: Date: 4.1 Velocity Speed and
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Name: Date: 4.2 Calculating Slope f
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Name: Date: 4.2 Analyzing Graphs of
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Page 3 of 4 1. For each position-ti
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Name: Date: 4.2 Analyzing Graphs of
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Name: Date: 4.3 Acceleration Accele
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Name: Date: 4.3 Acceleration and Sp
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Page 3 of 3 3. Graph 3: 4. Find acc
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Page 2 of 3 Example 1: How fast wil
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Page 141 and 142: Name: Date: 5.1 Internet Research S
Page 143 and 144: Name: Date: 5.1 Preparing a Bibliog
Page 145 and 146: Name: Date: 5.1 Mass vs. Weight Wha
Page 147 and 148: Page 2 of 2 1. A physical science t
Page 149 and 150: Page 2 of 2 How much does it weigh
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Page 153 and 154: Name: Date: 5.3 Equilibrium When al
Page 155 and 156: Name: Date: 6.1 Net Force and Newto
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Page 159 and 160: Name: Date: 6.3 Applying Newton’s
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Page 163 and 164: Name: Date: 6.3 Collisions and Cons
Page 165 and 166: Name: Date: 6.3 Rate of Change of M
Page 167 and 168: Page 3 of 3 6. A 50.-g (0.050-kg) e
Page 169 and 170: Page 2 of 2 1. A machine uses an in
Page 171 and 172: Page 2 of 2 Example 3: A 500-newton
Page 173 and 174: Page 2 of 2 7. You pull your sled t
Page 175 and 176: Page 2 of 2 The relationship betwee
Page 177 and 178: Page 2 of 2 6. Use the gear ratio f
Page 179 and 180: Page 2 of 2 The three classes of le
Page 181 and 182: Page 2 of 2 3. Now, calculate the g
Page 183 and 184: Page 2 of 2 To do this calculation,
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Page 187 and 188: Name: Date: 7.2 Conservation of Ene
Page 189: Page 2 of 2 Reading reflection 1. W
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Page 197 and 198: Page 2 of 2 Reading the temperature
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Page 201 and 202: Page 4 of 4 1. Surface temperatures
Page 203 and 204: Page 2 of 2 The graph below shows a
Page 205 and 206: Name: Date: 9.1 Using the Heat Equa
Page 207 and 208: Name: Date: 10.1 Measuring Mass wit
Page 209 and 210: Page 3 of 3 Reading the balance cor
Page 211 and 212: Page 2 of 2 d. Explain how the disp
Page 213 and 214: Page 2 of 3 Calculating volume of a
Page 215 and 216: Name: Date: 10.1 Density The densit
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Page 223 and 224: Name: Date: 10.4 Archimedes 10.4 Ar
Page 225 and 226: Name: Date: 10.4 Narcís Monturiol
Page 227 and 228: Name: Date: 10.4 Archimedes’ Prin
Page 229 and 230: Name: Date: 11.1 Layers of the Atmo
Page 231 and 232: Page 2 of 2 Reading reflection 1. H
Page 233 and 234: Page 2 of 3 Using temperature data
Page 235 and 236: Page 1 of 2 11.3 Joanne Simpson 11.
Page 237 and 238: Name: Date: 11.3 Weather Maps You h
Page 239 and 240: Name: Date: 11.3 Tracking a Hurrica
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Page 3 of 4 Hurricane Andrew crosse
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Name: Date: 12.1 Structure of the A
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Name: Date: 12.1 Atoms and Isotopes
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Name: Date: 12.1 Ernest Rutherford
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Name: Date: 12.2 Electrons and Ener
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Page 2 of 2 Reading reflection 1. H
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Page 2 of 2 Periodic Table Groups T
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Page 2 of 2 Using dot diagrams to r
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Page 2 of 2 13.2 Important note: If
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Page 2 of 2 Example 2: Aluminum and
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Page 2 of 2 13.2 Predict the name o
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Page 2 of 2 Using the information i
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Page 2 of 3 Conservation of atoms T
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Name: Date: 14.1 The Avogadro Numbe
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Page 3 of 4 Substance Elements in s
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Name: Date: 14.1 Formula Mass A che
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Name: Date: 14.2 Classifying Reacti
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Name: Date: 14.2 Predicting Chemica
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Name: Date: 14.2 Percent Yield You
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Name: Date: 14.4 Lise Meitner Lise
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Name: Date: 14.4 Marie and Pierre C
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Page 3 of 3 Reading reflection 1. W
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Page 2 of 2 Reading reflection 1. R
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Page 2 of 2 Reading reflection 1. U
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Page 2 of 2 1. The decay series for
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Page 2 of 2 Reading reflection 1. D
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. Page 2 of 3 i. Switches 2, 3, and
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Name: Date: 16.1 Benjamin Franklin
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Name: Date: 16.2 Using an Electric
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Page 3 of 4 Build a series circuit
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Name: Date: 16.3 Voltage, Current,
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Page 3 of 3 Now you will have the o
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Page 2 of 2 7. How much voltage wou
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Page 2 of 2 5. Use the series circu
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Page 2 of 2 In part (d) of problems
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Page 2 of 2 Reading reflection 1. N
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Page 2 of 2 7. The directions—nor
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Page 2 of 2 6. Repeat step 5 to for
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Page 2 of 2 A transformer steps dow
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Page 2 of 2 4. Calculate the power
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Page 2 of 4 Determining the relativ
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Page 4 of 4 Extension—Creating cl
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Page 2 of 2 Reading reflection 1. N
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Name: Date: 19.1 Earth’s Interior
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Page 2 of 2 Reading reflection 1. L
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Page 2 of 2 Reading reflection 1. E
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Name: Date: 19.4 Continental United
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Page 3 of 4 When a mountain is form
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Name: Date: 20.1 Averaging The most
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Page 2 of 5 Locating the epicenter
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Page 4 of 5 20.1 For each of the pr
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Name: Date: 20.2 Volcano Parts 20.2
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Name: Date: 21.2 Calculating Concen
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Name: Date: 21.2 Solubility In this
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Page 3 of 3 The influence of temper
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Page 2 of 3 Work through these exam
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Name: Date: 21.3 Calculating pH The
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Name: Date: 22.1 Groundwater and We
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Page 3 of 3 Testing the model: 1. W
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Name: Date: 24.1 Period and Frequen
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Page 2 of 2 2. Use the grids below
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Page 2 of 2 2. Use the grids below
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Page 2 of 3 x-axis (blocks) Height
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Name: Date: 24.3 Decibel Scale The
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Page 2 of 2 a. ____________________
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Page 2 of 2 2. Two students want to
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Name: Date: 24.3 Palm Pipes Project
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Page 3 of 3 6. Challenge: You can f
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Page 2 of 2 Answer the following pr
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Page 2 of 2 4. You see a chair that
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Page 2 of 2 a. ____________________
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Name: Date: 25.3 Using Ray Diagrams
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Page 2 of 2 2. Light strikes a mirr
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Page 2 of 2 Which way does the ligh
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Page 2 of 2 25.3 1. A lens has a fo
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Name: Date: 26.1 Gravity Problems I
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Name: Date: 26.1 Universal Gravitat
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Page 1 of 2 26.1 Nicolaus Copernicu
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Page 1 of 2 26.1 Galileo Galilei Ga
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Page 1 of 2 26.1 Johannes Kepler 26
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Name: Date: 26.1 Measuring the Moon
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Page 3 of 3 Semi-Circle Card: 26.1
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Page 2 of 2 Reading reflection 1. B
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Page 2 of 2 Part 2: Provisions for
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Page 1 of 2 27.1 Arthur Walker 27.1
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Name: Date: 27.2 The Inverse Square
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Page 2 of 3 1. Fill in the missing
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Name: Date: 28.1 Understanding Ligh
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Name: Date: 28.1 Parsecs You have a
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Page 1 of 2 28.1 Edwin Hubble Edwin
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Name: Date: 28.2 Light Intensity Pr
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Page 2 of 2 If we know the brightne
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Page 2 of 2 Solving Doppler Shift P
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13. A decimeter is 100 times larger
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Skill Sheet 1.3: Significant Digits
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7. Yes, there is a relationship bet
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6. The slope is the same (2.0) unti
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13. S Sh—Sand and shells on the b
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10. 410 miles 11. 6.6 miles -------
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Skill Sheet 4.2: Analyzing Graphs o
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Skill Sheet 5.1: Mass, Weight, and
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Skill Sheet 6.3: Applying Newton’
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Skill Sheet 7.1: Mechanical Advanta
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8. The middle gear turns left. The
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Skill Sheet 7.3: Power in Flowing E
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Skill Sheet 10.1: Calculating volum
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3. Answers are: a. 100 cm 3 b. 13 N
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Skill Sheet 11.3: Weather Maps Samp
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a. b. c. d. e f. Skill Sheet 12.2:
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Skill Sheet 14.1: Chemical Equation
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must be blocking their insulin’s
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8. The current is approximately the
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7. Students can find information ab
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Skill Sheet 17.4: Electrical Power
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Skill Sheet 19.1: Charles Richter 1
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Practice 2: 1. First problem is don
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Skill Sheet 21.3: Calculating pH 1.
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Question 8 (con’t) 9. The new wav
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Skill Sheet 25.2: The Human Eye a.
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Skill Sheet 26.1: Nicolaus Copernic
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Skill Sheet 27.1: Arthur Walker 1.
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