PES Skill Sheets.book - Capital High School

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Name: Date: 17.4 Electrical Power How do you calculate electrical power? In this skill sheet you will review the relationship between electrical power and Ohm’s law. As you work through the problems, you will practice calculating the power used by common appliances in your home. During everyday life we hear the word watt mentioned in reference to things like light bulbs and electric bills. The watt is the unit that describes the rate at which energy is used by an electrical device. Energy is never created or destroyed, so “used” means it is converted from electrical energy into another form such as light or heat. Since energy is measured in joules, power is measured in joules per second. One joule per second is equal to one watt. To calculate the electrical power “used” by an electrical component, multiply the voltage by the current. A kilowatt (kWh) is 1,000 watts or 1,000 joules of energy per second. On an electric bill you may have noticed the term kilowatt-hour. A kilowatt-hour means that one kilowatt of power has been used for one hour. To determine the kilowatt-hours of electricity used, multiply the number of kilowatts by the time in hours. . • You use a 1,500-watt heater for 3 hours. How many kilowatt-hours of electricity did you use? You used 4.5 kilowatt-hours of electricity. 1. Your oven has a power rating of 5,000 watts. Current × Voltage = Power, or P = IV 1 kilowatt 1,500 watts × = 1.5 kilowatts 1,000 watts 1.5 kilowatts × 3 hours = 4.5 kilowatt-hours a. How many kilowatts is this? b. If the oven is used for 2 hours to bake cookies, how many kilowatt-hours (kWh) are used? c. If your town charges $0.15 per kWh, what is the cost to use the oven to bake the cookies? 2. You use a 1,200-watt hair dryer for 10 minutes each day. a. How many minutes do you use the hair dryer in a month? (Assume there are 30 days in the month.) b. How many hours do you use the hair dryer in a month? c. What is the power of the hair dryer in kilowatts? d. How many kilowatt-hours of electricity does the hair dryer use in a month? e. If your town charges $0.15 per kWh, what is the cost to use the hair dryer for a month? 3. Calculate the power rating of a home appliance (in kilowatts) that uses 8 amps of current when plugged into a 120-volt outlet. 17.4
Page 2 of 2 4. Calculate the power of a motor that draws a current of 2 amps when connected to a 12 volt battery. 5. Your alarm clock is connected to a 120 volt circuit and draws 0.5 amps of current. a. Calculate the power of the alarm clock in watts. b. Convert the power to kilowatts. c. Calculate the number of kilowatt-hours of electricity used by the alarm clock if it is left on for one year. d. Calculate the cost of using the alarm clock for one year if your town charges $0.15 per kilowatt-hour. 6. Using the formula for power, calculate the amount of current through a 75-watt light bulb that is connected to a 120-volt circuit in your home. 7. The following questions refer to the diagram. a. What is the total voltage of the circuit? b. What is the current in the circuit? c. What is the power of the light bulb? 8. A toaster is plugged into a 120-volt household circuit. It draws 5 amps of current. a. What is the resistance of the toaster? b. What is the power of the toaster in watts? c. What is the power in kilowatts? 9. A clothes dryer in a home has a power of 4,500 watts and runs on a special 220-volt household circuit. a. What is the current through the dryer? b. What is the resistance of the dryer? c. How many kilowatt-hours of electricity are used by the dryer if it is used for 4 hours in one week? d. How much does it cost to run the dryer for one year if it is used for 4 hours each week at a cost of $0.15 per kilowatt-hour? 10. A circuit contains a 12-volt battery and two 3-ohm bulbs in series. a. Calculate the total resistance of the circuit. b. Calculate the current in the circuit. c. Calculate the power of each bulb. d. Calculate the power supplied by the battery. 11. A circuit contains a 12-volt battery and two 3-ohm bulbs in parallel. a. What is the voltage across each branch? b. Calculate the current in each branch. c. Calculate the power of each bulb. d. Calculate the total current in the circuit. e. Calculate the power supplied by the battery. 17.4
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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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Name: Date: 5.1 Ratios and Proporti
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Name: Date: 5.1 Internet Research S
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Name: Date: 5.1 Preparing a Bibliog
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Name: Date: 5.1 Mass vs. Weight Wha
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Page 2 of 2 1. A physical science t
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Page 2 of 2 How much does it weigh
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Page 2 of 2 Answer the following pr
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Name: Date: 5.3 Equilibrium When al
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Name: Date: 6.1 Net Force and Newto
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Page 2 of 2 Reading reflection 1. I
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Name: Date: 6.3 Applying Newton’s
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Name: Date: 6.3 Momentum Conservati
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Name: Date: 6.3 Collisions and Cons
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Name: Date: 6.3 Rate of Change of M
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Page 3 of 3 6. A 50.-g (0.050-kg) e
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Page 2 of 2 1. A machine uses an in
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Page 2 of 2 Example 3: A 500-newton
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Page 2 of 2 7. You pull your sled t
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Page 2 of 2 The relationship betwee
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Page 2 of 2 6. Use the gear ratio f
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Page 2 of 2 The three classes of le
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Page 2 of 2 3. Now, calculate the g
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Page 2 of 2 To do this calculation,
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Name: Date: 7.2 Energy Transformati
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Name: Date: 7.2 Conservation of Ene
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Page 2 of 2 Reading reflection 1. W
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Name: Date: 7.3 Power In science, w
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Name: Date: 7.3 Power in Flowing En
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Name: Date: 7.3 Efficiency and Ener
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Page 2 of 2 Reading the temperature
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Page 2 of 4 1. For each of the prob
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Page 4 of 4 1. Surface temperatures
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Page 2 of 2 The graph below shows a
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Name: Date: 9.1 Using the Heat Equa
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Name: Date: 10.1 Measuring Mass wit
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Page 3 of 3 Reading the balance cor
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Page 2 of 2 d. Explain how the disp
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Page 2 of 3 Calculating volume of a
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Name: Date: 10.1 Density The densit
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Name: Date: 10.3 Pressure in Fluids
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Name: Date: 10.3 Boyle’s Law The
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Name: Date: 10.4 Charles’s Law Ch
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Name: Date: 10.4 Archimedes 10.4 Ar
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Name: Date: 10.4 Narcís Monturiol
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Name: Date: 10.4 Archimedes’ Prin
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Name: Date: 11.1 Layers of the Atmo
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Page 2 of 2 Reading reflection 1. H
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Page 2 of 3 Using temperature data
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Page 1 of 2 11.3 Joanne Simpson 11.
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Name: Date: 11.3 Weather Maps You h
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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 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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Page 277 and 278: Name: Date: 14.2 Percent Yield You
Page 279 and 280: Name: Date: 14.4 Lise Meitner Lise
Page 281 and 282: Name: Date: 14.4 Marie and Pierre C
Page 283 and 284: Page 3 of 3 Reading reflection 1. W
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Page 287 and 288: Page 2 of 2 Reading reflection 1. U
Page 289 and 290: Page 2 of 2 1. The decay series for
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Page 293 and 294: . Page 2 of 3 i. Switches 2, 3, and
Page 295 and 296: Name: Date: 16.1 Benjamin Franklin
Page 297 and 298: Name: Date: 16.2 Using an Electric
Page 299 and 300: Page 3 of 4 Build a series circuit
Page 301 and 302: Name: Date: 16.3 Voltage, Current,
Page 303 and 304: Page 3 of 3 Now you will have the o
Page 305 and 306: Page 2 of 2 7. How much voltage wou
Page 307 and 308: Page 2 of 2 5. Use the series circu
Page 309 and 310: Page 2 of 2 In part (d) of problems
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Page 317 and 318: Page 2 of 2 7. The directions—nor
Page 319 and 320: Page 2 of 2 6. Repeat step 5 to for
Page 323: Page 2 of 2 A transformer steps dow
Page 329 and 330: Page 2 of 4 Determining the relativ
Page 331 and 332: Page 4 of 4 Extension—Creating cl
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Page 335 and 336: Name: Date: 19.1 Earth’s Interior
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Page 347 and 348: Name: Date: 19.4 Continental United
Page 349 and 350: Page 3 of 4 When a mountain is form
Page 351 and 352: Name: Date: 20.1 Averaging The most
Page 353 and 354: Page 2 of 5 Locating the epicenter
Page 355 and 356: Page 4 of 5 20.1 For each of the pr
Page 357 and 358: Name: Date: 20.2 Volcano Parts 20.2
Page 359 and 360: Name: Date: 21.2 Calculating Concen
Page 361 and 362: Name: Date: 21.2 Solubility In this
Page 363 and 364: Page 3 of 3 The influence of temper
Page 365 and 366: Page 2 of 3 Work through these exam
Page 367 and 368: Name: Date: 21.3 Calculating pH The
Page 369 and 370: Name: Date: 22.1 Groundwater and We
Page 371 and 372: Page 3 of 3 Testing the model: 1. W
Page 373 and 374: 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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PES Skill Sheets.book - Capital High School

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