connected in parallel to a 12 V power supply, as shown below. When you ride a playground swing, your potential energy is greatest at the highest point. Which of the following statements are true about electric power and electric potential energy?. Instructions can be found on pages 6-7 and the student worksheet can be found on page 23. Dry cells is not a source of electricity. Try physics tests on motion, energy, and forces. 7 A of current, what amount of power is used by the blender? 13. Hydroelectric power is important to our Nation. If the oven is used for 2 hours to bake cookies, how many kilowatt-hours (kWh) are used?. More "Physics Work Power Energy Worksheet Answer Key" links Physics 20 Note-A-Rific Miscellaneous Physics Data Sheet List of Physics Directing Words Lab Manual Anatomy of an Answer Top 10 Things to Know to Survive Physics 20/30 Program of Studies. and demonstrations (as indicated below). Power is the rate at which energy is transferred and power is the measure of how fast work can be done. Work uses energy. since energy is measured in joules, pow er is measured in joules per second. If the disposal is plugged into a wall outlet. Electrical power and energy. Created By Ashley Scott; In 18 Playlist(s) Short Answer: Energy. Thought-provoking questions afford students chances to reflect on what they’ve read. Many everyday items such as calculators and other low power consuming devices can be powered by solar energy effectively. mathswithgraham. You need to pay close attention to every little detail and find the exact nook and cranny that each detail falls into. Hi, looking for Electrical Power And Energy Worksheet Answers? you are specifically right here. Static electricity is formed when electricity gathers in one location. Goal • Practise calculating the cost of energy. Chapter 7 - Characteriscs of Waves. Energy Forms and Transfers. Physics worksheet – Electric charge, current, potential, energy & power (e = 1. Once you find your worksheet(s), you can either click on the pop-out icon or download button to print or download your desired worksheet(s). They even make the mistake of thinking ‘Energy and Power’ as synonyms. Worksheets guide groups into choosing a future electricity generating. Word-Find Answers PDF. Define sound energy. The car on the right has more kinetic energy because it is moving faster. It requires the same amount of work to do these two jobs (see question #23) and the same amount of time. Mission 7 - Saving Energy PDF 1MB. To print a part of the book 1. That household form of electricity is called alternating current. What happened to its kinetic energy? Was the kinetic energy changed to heat energy by the force of friction between the ball and the desk? Explain your answer. All Worksheets with Keys: Sunday, 22 Electrical Circuits - Basics 4c-Work-Energy MC practice problems-ANSWERS. Insulator Insulators, such as wood and plastic, are materials that do not easily transmit heat, cold or electricity. Sankey Diagram Animation - Light Bulb. Input energy is taken in by the device in one form and transformed to output energy in another form. Physics 08-05 Electric Potential Energy-Potential Difference. Upgrading fossil fuel power plants to combined heat and power (CHP) plants. This bundle includes electric energy notes in both PowerPoint and Word format, 6 electric circuit worksheets with answer keys, and an electric conductors and insulators lab. useful energy via chemical reactions at a rate of ~13 TW • Energy released by conversion reactions can be converted to mechanical energy or electricity • Some reactions are used to convert a primary energy sources to more useful forms of chemically stored energy – Solid fossil fuels Liquid fuels – Natural Gas Hydrogen. Describe how this renewable energy works. the electric current in the coil of insulated wire wound around it. Justify your answer. During the flow, the electrons gain kinetic energy which can be described as the electrical energy. Any solar energy that you do not use simultaneous with production will go back into the electrical grid through the meter. Nuclear Power Plant worksheet and the answers are here. The Teacher Infobook provides fact sheets about energy, the major energy sources, electricity, energy consumption, and energy efficiency and conservation. Batteries are reserves of chemical energy that can be transformed into electrical energy. All Worksheets with Keys: Sunday, 22 Electrical Circuits - Basics 4c-Work-Energy MC practice problems-ANSWERS. Electricity, Magnets & Circuits; Physics Work, Energy & Power. Free gamified quizzes on every subject that students play in class and at home. Below is information about the student activity/lesson plan from your search. Work uses energy. org, and education screening materials About Our mission, the film, education, reviews, funding, and more See the Film Find or host screenings, see past screenings, and get the DVD. Lessons and Key Unit Pages for "Energy, Electricity, and Magnetism" Energy Notes: Introduction to Energy and the Two Types of Energy: Lab: Potential and Kinetic Energy: Lab Exploring Kinetic and Potential Energy Using a Pendulum: Lab: Kinetic and Potential Energy Answers: Selected Answers to Lab Exploring Kinetic and Potential Energy Using a. James Clerk Maxwell was a pioneer in the field of electromagnetism. HOME ENERGY AUDIT: POWER WORKSHEET ANSWER KEY. This electricity can then be used to power a load, such as a light or a tool. One is 100 ohms and the other is 300 ohms. Simple calculations on work, energy and power using simple formulas. The Cost of Electrical Energy Any device or appliance that plugs into an electrical outlet uses electrical energy. EFFICIENCY OF ENERGY CONVERSION 57 Illustration 4-1. • Use the diagram on the worksheet for a class discussion on energy transfer that takes place when coal is used to generate electricity. Watching television, playing video games, using the microwave, etc. How To Get Viagra Prescription. ELECTRIC POWER AND WORK Voltage and current are not measurements of electric power and work. Most of the energy losses of electricity generation come from conversion losses. Created for the NTEP II program on behalf of the National Renewable Energy Laboratory in Golden, Colorado. The amount of energy used by an appliance depends on its power and the time the appliance works for. notebook 4 April 07, 2011 Homework­ Complete the Energy Consumption Worksheet EnerGuide and Energy Star Labels When buying an electrical device, it is important to consider both the price of the device and the cost of operating the device over time. The Annual Energy Review (AER) is the U. HOME ENERGY AUDIT: ENERGY PRODUCTION WORKSHEET ANSWER KEY. Energy = power time c. One Lincoln Drive, Cresskill, NJ 07626 Phone: 201-227-7791 Fax: 201-567-0028. Worksheet 2 Circuits w2e w2d. Power Smart for Schools is an online hub of energy focused activities and lessons for teachers looking for new ways to inspire their students. Energy is measured in joules. Electrical potential is measured in volts, which is the potential electrical energy per charge. Home Survey - Power in the Kitchen. Electromagnetic induction transfers mechanical energy into electrical energy. List the three major fossil fuels. Potential and kinetic energy printables. The rider must be considered as having stored energy, some of which is converted to mechanical energy. From what form of energy did the bike gain mechanical energy? The system of Earth, bike, and rider remains the same, but now the energy involved is not mechanical energy alone. 4 Conveyor belt analogy of an electrical circuit coal mine = power source conveyor belt. A generator is a device that converts kinetic energy. For many series, data begin with the year 1949. (c) Bulb D is then removed from its socket. A net energy meter keeps track of the all the power your solar system produces. 20, 2019 — Climate change and over-tapped waterways could leave developing parts of Asia without enough water to cool power plants in the near future. To understand energy transfer and power dissipation and circuits. A stretched or unstretched spring? A ticking or newly wound-up clock? A new battery in an unlit flashlight or in one which is lit? A roller coaster car at the top of a hill or at the bottom?. A power station burns 75 ki lograms of coal per second. For many series, data begin with the year 1949. The unit of electric power is the _____. You may choose the answer(s) from the following list of words solar cell, turbine, mixer, fan, steam engine, automobiles, green plants, nuclear reactor, electric bulb, torch, electric bulb, microphone, loudspeaker, geyser, heater, car battery, inverter, LPG. Which of these has kinetic energy? (a). State whether the following statement are true or false. permanent magnet 2. Assume that all overhead wires are energized at lethal voltages. The Carbon Cycle Quiz Forms of Energy (solar, heat, sound, and motion) Quiz Work and Energy Quiz Potential & Kinetic Energy Quiz Thermal Energy Quiz Chemical Equilibrium Quiz Energy and Heat Quiz Conservation of Energy and Calorimetry Quiz Entropy and Gibbs Free Energy Quiz Energy Examples:. Maxwell theorized that electricity, light, and magnetism were all related phenomenon. That is the only way this country can liberate itself from the present political and energy crisis. (Answer in watt hours) c) Calculate the power rating of portable sander that operates at a voltage of 12 with a current of 2. Mr Trask's Physics Website. Work, Energy and Power - page 1 Work, Power and Energy Worksheet Work and Power 1. Program 2012. 5 V battery. We have fun activities to add to your science lessons. As an extension, play Renewable Energy Bingo as a class. Reveal answer Hide answer. - NUCLEAR POWER This lesson is done with the PowerPoint presentation nuclear_power. Using Electricity and Magnetism ANSWER KEY Using Electricity and Magnetism Chapter Project Worksheet 1 1-6. A 60-Watt light bulb would consume 30 Joules of electrical energy in 2 seconds. a) In pairs, think about different kinds of energy used to produce electricity. To calculate the consumption of an electrical appliance in kWh, you have to take into account three factors: the capacity of your electrical appliance, expressed in watt. 10 Th is is made from ancient plant material and gives coal most of its energy. Logged in members can use the Super Teacher Worksheets filing cabinet to save their favorite worksheets. Get definition, explanation & examples on Renewable and non-renewable energy. To help them grasp the concept of energy, access their prior knowledge and provide concrete experiences that allow the students to connect light, heat, and sound to their everyday lives. Electricity is constantly flowing through all of the wires in your town. Try physics tests on motion, energy, and forces. 11 quadrillion Btus of energy. If the oven is used for 2 hours to bake cookies, how many kilowatt-hours (kWh) are used?. ) with full confidence. The energy generated by a grid-connected system is used first to power the AC electrical needs of the home or business. ENTER CODE; LOG IN Current Electricity. It relates to mass, force and motion. The energy is used to do work on the electrons in the circuit. Click the Reveal the Answer button to show the answer. Conceptual Physics: Electricity and Electrical Energy Units. This is the energy used by a device running at 1000 W for 1 hour. worksheets bill nye waves worksheet chicochino, bill nye cells worksheet bill nye electricity worksheet answers choice image worksheet math, heat calculations worksheet answers awesome middle school physical, heat calculations worksheet answers awesome middle school physical and resume brilliant ideas of 7th grade science metric system worksheets on worksheet metric for every. Energy work and power quiz questions and answers pdf, for physics certifications. Wind energy cost is determined by the cost of installing the wind turbine and the amount of energy produced. Energy worksheets. Since whenever there is current there is charge, both electric and magnetic fields exist. The most common used electrical formulas - Ohms Law and combinations Electric Energy. Define the terms work, mechanical energy, potential energy, kinetic energy, and power. com electricity. Note: Students’ answers may be more or less complex than those given. ENERGY RESOURCES AND ENERGY TRANSFER 1. What is the cost of running the shock collar as described in parts a and b? Unit 15: Electrical Circuits, Worksheet C: Combination Circuits, Power in Circuits, Capacitors ©2009 by G. source of mechanical energy 4. A computer that is 87% efficient consumes 375 kWh of energy. This crossword contains the following questions and answers: stored energy potential energy energy of a moving object kinetic energy the ability to do work energy work done in a certain amount of time power. They are meant to help guide you through your struggle to understand and complete the assignments. We have 12 answers for this clue. Questions and Answers from Chegg. Electric Power : Physical Science ‐ Recall that the rate energy is converted from one form to another is power. Windmills and gas from tips can also generate electricity. This worksheet will guide you in making a quantitative comparison between the electrical energy consumed by the Black Rock Forest Science & Education Center (SEC) and the solar energy received by the Forest. The Energy category covers the description, definition, and use of all types of energy. Some of the worksheets for this concept are Electricity unit, Basic electricity work, Conductors and insulators, Electricity, Electrical charges, Electricity and magnetism, Current electricity basics work, Energy calculation work 2018. What is the cost of running the shock collar as described in parts a and b? Unit 15: Electrical Circuits, Worksheet C: Combination Circuits, Power in Circuits, Capacitors ©2009 by G. Magnetic Effect of Current Chapter 13 One mark for each correct answer. Motors & Generators Electrical power and energy physics classroom answers. energy conversion, valve, energy transmission, control and miscellaneous symbols; use of appropriate British and International Standards. Missy Diwater, the former platform diver for the. An electric heater draws 1100 W of power. since energy is measured in joules, pow er is measured in joules per second. You will receive your score and answers at the end. There are 2 A of current in a circuit that has one 1. Find answers for the crossword clue: Energy. Fast delivery by courier or airmail. 79kb; Physics 08-08 Capacitors and Energy Stored in Capacitors. We will see in this section that work done by the net force gives a system energy of motion, and in the process we will also find an expression for the energy of motion. What is the resistance of the radio? b) What type of energy is the electrical energy from the battery being converted into in this device? 12. Answer Key: Practice Worksheet - G9 - Term3 True/False Indicate whether the statement is true or false. Basic Electrical Formulas. Write the equation for electrical energy using voltage, current and time. Evaluate the students performance on the Energy Quiz, Sources of Energy Worksheet, or Energy Search Worksheet Lesson Extensions The instructor may choose to present either of the worksheets (Sources of Energy Worksheet or Energy Search Worksheet). We have a lot of energy when we are rested or excited, and less energy when we are tired or bored. These hands-on explorations into natural resources, energy conservation, and exciting renewable energy sources like hydropower, wind power, bioenergy, and solar energy provide an excellent tool to motivate student learning. • Use the diagram on the worksheet for a class discussion on energy transfer that takes place when coal is used to generate electricity. A unit of power. Calculate the work done by a 47 N force pushing a 0. file 00003 Question 16. Chapter 3 - Forces in Fluids. 0 V battery draws a current of 25 A. This is provided by batteries in the circuits you have been looking at. Getting Familiar With The Options. I'm making a worksheet where the wind speed defines the potential energy of the location. If a clock expends 2 W of power from a 1. Energy and Power and the physics of explosions Comet Shoemaker-Levy crashes into Jupiter1 At the end of the Cretaceous period, the golden age of dinosaurs, an asteroid or comet about 10 miles in diameter headed directly towards the Earth with a velocity of about 20 miles per second, over ten times faster than our speediest bullets. This bundle contains 11 ready-to-use Electricity Worksheets that are perfect for students who want to learn more about Electricity which is a force caused by electric charge. 37kb; Physics 08-06 Electric Potential in a Uniform Electric Field. The power of the wind and rain can be used to make electricity. - NUCLEAR POWER This lesson is done with the PowerPoint presentation nuclear_power. If you work faster, you use more power. If your list does not include any devices that use electric motors, simply add the power (running) requirements of all the items on your list to obtain the maximum power needed. According to Ohm's Law electric potential difference(V is directly proportional to the product of the current(I times the resistance(R. A power station burns 75 ki lograms of coal per second. work? Circle all correct answers. electrical energy is a result of energy transformations. file 00003 Question 16. permanent magnet 2. (motion) energy An ojet's movement retes energy Thermal (heat) energy The vibration and movement of molecules Radiant energy Electromagnetic waves Electrical energy Movement of electrons Chemical energy Stored in bonds of atoms and molecules Nuclear energy Stored in the nucleus of an atom; released when nucleus splits or. Define sound energy. The power of the wind and rain can be used to make electricity. Electrical energy (measured in watt-hours) is the ability to do work with electrical power in a circuit. Determine at least three different ways you could generate electrical power to supply the electric power needs at this cabin. Answer Key - Note Taking Worksheet (Note: there is some extrainformation on this sheet that is not on student handout) Ancient Times The oldest remains of the island of Cyprus come from the Neolithic Age, in 8200 – 3900 B. Introduce your sixth graders to our science worksheets for 6th grade and ensure thorough understanding of the grade’s fundamental new concepts. Keywords: efficiency, energy, gravitational potential energy, kinetic energy, power, work, conservation of mechanical energy, change in. A toaster transfers electric energy taken from the electrical outlet into thermal energy, which is heat. Read the four examples in the box and determine which ones represent work and which do not and then check your answer on the website above. Energy4me is an energy information resource for elementary and secondary educators. Answer: A, B, C, F a. What is the best way to find the emitter for Appendix 2 Lesson Quizzes and Answer Key. Student Worksheet on Energy Resources. Electrical engineering is concerned with transmission and ultilization of two things - energy and information. Your oven has a power rating of 5,000 watts. 50kb; Physics 08-07 Electric Potential Due to a Point Charge and Equipotential Lines. Tommy runs his juicer every morning. Explain how work and energy are affected by power. Electricity obtained by harnessing the power of water flowing down from a high level. Ohms law practice worksheet free printables worksheets library download and electric power energy. electromagnet. Directions: Answer the questions below in the space provided. Currently, the share of renewable energy sources in net energy production is only about 10% worldwide and 8% in the United States. Electromagnetic induction transfers mechanical energy into electrical energy. A major coal fired electrical power plant uses 4500 tons of coal each day. 5 V battery, what amount of current is supplying the clock? 14. Energy supplied by setting up a gradient of charges comes from whats called an electrical potential. These machines vary in size from as small as one meter to a hundred meters in rotor diameter, and from 100-1000 kilowatts in power output. Some appliances, such as toy cars or small radios, use cells to supply electrical energy. Quickly access your most used files AND your custom generated worksheets! Please login to your account or become a member and join our community today to utilize this helpful feature. The rider must be considered as having stored energy, some of which is converted to mechanical energy. potential energy worksheet answers electrostatics problems finding energy 1 2mgh physics work problems with solutions power sample problems with answers physics solved problems work energy work and energy problems problems on (friction) solution with answers electrical energy problems with answers electric energy problems and answers Work and. Electricity powers our computers, kitchen appliances, televisions, and even some cars. This is done in steps starting with a nuclear reaction which generates heat to produce steam. Electrical energy (measured in watt-hours) is the ability to do work with electrical power in a circuit. We feel it deliver something new for Work Energy And Power Worksheet Answer Key Also Electrical Power Worksheet Answers Best Worksheet Parallel. What is Energy? 4. electrical energy. Energy Basics. The steam in turn is used to turn a generator which finally produces electricity. Ecological _____. Small electric cells (commonly called batteries, as in AA batteries) are examples of simple batteries for everyday use. The use of. By latest estimates, each NADH (6 from each glucose fed into the Krebs Cycle) contributes to the production of 2. Chemical, mechanical, thermal, electrical, radiant, nuclear. Power is the amount of energy used by an electrical appliance. Pelton wheel turbine, Francis turbine, Kaplan turbine and Propeller turbine are prime movers used in hydraulic power plants. 0 A flows through a flashlight bulb when it is connected to 6. When the Print window opens, type in a range of pages to print. Calculate the power rating of the light bulb. Thus, the power is the same for both tasks. Below is information about the student activity/lesson plan from your search. KINETIC AND POTENTIAL ENERGY WORKSHEET Name:_____ Determine whether the objects in the following problems have kinetic or potential energy. Evaluate the students performance on the Energy Quiz, Sources of Energy Worksheet, or Energy Search Worksheet Lesson Extensions The instructor may choose to present either of the worksheets (Sources of Energy Worksheet or Energy Search Worksheet). Answer keys for activities can be found on pages 34-51. Section 3 (p. Using Electricity Worksheet, students answer questions based on a reading passage to build their understanding of how electricity is made and works. What is energy? What are the 5 main sources of RENEWABLE energy?. Sarah uses more energy. The keys are to be viewed after you have completed an assignment to check answers or if you are completely stuck. Thermal energy is the internal energy of an object due to the motion and collision of atoms. 00 x 104 W of power to drive at 5. WORKSHEET B Energy and Change Sources of Renewable energy Use the fact sheet to answer the following questions: 1. Critical Thinking Questions are included on page 8. Energy and Electricity Worksheets, resources and activities to support teaching and learning about energy, electricity and circuits. Electricity is a type of energy it usually resides in two forms. One is 100 ohms and the other is 300 ohms. The point of action of a constant force F is displaced a distance d. By knowing this simple law, you understand the concept that is the basis for the analysis of any electrical circuit!. Kinetic and Potential Energy Worksheet – To have motion, energy has to be transferred from 1 object to another. Showing top 8 worksheets in the category work and power answers. the number of days per year when the appliance is in use. Movement of electrons. This version of the conservation-of-energy principle, expressed in its most general form, is the first law of thermodynamics. Chapter 3 Practice Quiz Answers. Online revision quiz for the topic Electrical Circuits. EFFICIENCY OF ENERGY CONVERSION 57 Illustration 4-1. If your list does not include any devices that use electric motors, simply add the power (running) requirements of all the items on your list to obtain the maximum power needed. com electricity. Electrical Energy is the capacity to do work, and the unit of work or energy is the joule ( J ). Science Energy Worksheets Worksheets for all from Work Power And Energy Worksheet, source: bonlacfoods. 5 V battery. Students learned about Coulomb's Law in the previous lesson and now apply that understanding to the concept of potential difference as seen by electric field lines. ENERGY RESOURCES STUDENT WORKSHEETS Susana Amorós Ortega 4 IES TORRE VICENS Lleida The electricity journey: from power stations to our homes 4. Hydro-electric power stations can produce a great deal of power very cheaply. That means objects. Today,PV systems are mainly used to generate electricity in areas that are a long way from electric power lines. What are electricity and power generation? Electricity is a type of energy that we use to power lots of things around our homes. electrical energy is a result of energy transformations. Refer to Example Problem 1 to solve the following problem. Some of the worksheets below are Force and Motion Worksheets in PDF, Lessons on Force and Motion, Balanced and Unbalanced Forces and Velocity and Acceleration with colorful diagrams. A race-care traveling at its maximum speed(c) Both forms. In 2013, about, 7. An alternative to building new power stations to supply the increase in demand for electricity is to use what we have more efficiently (i. If electricity costs 10¢ per kW h, calculate the bill. Learn vocabulary, terms, and more with flashcards, games, and other study tools. It didn't say where or whether this was electricity or heat. A 3 kg ball is rolling 2 m/s. Idaho and Wyoming are turning their aspirations into reality with the help of Rocky Mountain Power programs. All Worksheets with Keys: Sunday, 22 Electrical Circuits - Basics 4c-Work-Energy MC practice problems-ANSWERS. Calculate the work done by a 2. You may choose to use any or all questions with your students for discussion or writing integration. mass and height above the ground 5. Ohm’s Law and Power Equation Practice Worksheet 12. Displaying top 8 worksheets found for - Electricity. potential energy worksheet answers electrostatics problems finding energy 1 2mgh physics work problems with solutions power sample problems with answers physics solved problems work energy work and energy problems problems on (friction) solution with answers electrical energy problems with answers electric energy problems and answers Work and. Next to biomass, we draw more renewable energy from the motion of water than from any other resource. Kinetic and Potential Energy Worksheet - To have motion, energy has to be transferred from 1 object to another. Energy, Work, and Simple Machines CHAPTER Practice Problems 10. During the flow, the electrons gain kinetic energy which can be described as the electrical energy. Tests & Worksheets; Electricity Answer Key. manipulate the energy input, observe the process of electrical energy generation and manipulate the output. Energy and Electricity Worksheets, resources and activities to support teaching and learning about energy, electricity and circuits. 1 Electrical Power and Energy 1. Questions include the application of circuits (para. Suppose you are building a cabin far away from electric power service, but you desire to have electricity available to energize light bulbs, a radio, a computer, and other useful devices. Use these worksheets with kindergarten and grade one students. Wind Power. There are 2 A of current in a circuit that has one 1. Using the equations above we can also write. The calculation is as follows:. 11 quadrillion Btus of energy. Determine at least three different ways you could generate electrical power to supply the electric power needs at this cabin. Chemical Energy --Chemical energy is a form of potential energy related to the breaking and forming of chemical bonds. The most common used electrical formulas - Ohms Law and combinations Electric Energy. A skier at the top of the mountain(a) Kinetic Energy _____2. Ohm’s Law and Power Equation Practice Worksheet 12. The City School /Reinforcement Worksheet/EoY 2016-17/Science/Class 7/Electrical CircuitsPage 3 of 7 Q. Work Work and energy are the same thing. Print Calculating Energy & Power. Magnets, Electricity Worksheets Printable Worksheets. For eight more points, write a one-page essay comparing and contrasting the problems and solutions described in The End of Suburbia with those in Treasures of the Earth: Power. The study of energy is abstract and often difficult for first grade students. Nuclear Power Plants Worksheet Directions Many nuclear power plants are dependent upon the fission of enriched U-235. Energy Calculation Worksheet 2 You will use the information on this page and the results from counting the squares on the city grid to determine the energy, cost, and carbon footprint of the lights from this city. A 60-Watt light bulb would consume 30 Joules of electrical energy in 2 seconds. provides power through the base c. ENERGY RESOURCES TEACHING NOTES Susana Amorós Ortega 1 IES TORRE VICENS Lleida LESSON 3. What is energy? It's a crucial part of physical science that we depend on every day. Light - Photons are a form of energy. Put the correct letter in the blank. Energy and Power and the physics of explosions Comet Shoemaker-Levy crashes into Jupiter1 At the end of the Cretaceous period, the golden age of dinosaurs, an asteroid or comet about 10 miles in diameter headed directly towards the Earth with a velocity of about 20 miles per second, over ten times faster than our speediest bullets.
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