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1. Explain specific heat. What factors effect the heat (or thermal energy) ina body? 2. Consider...
2. Consider going for a walk on a cold fall day. Why do you feel colder...
2. Consider going for a walk on a cold fall day. Why do you feel colder if the wind is blowing than if it is not?
Reading: Chapters 16-17Questions:1. Compare the metal doorknob and the wooden door of an unheated outdoor shed...
Reading: Chapters 16-17Questions:1. Compare the metal doorknob and the wooden door of an unheated outdoor shed on a cold day. Whichis colder? Why does the metal doorknob feel colder? 2. Wood is a better insulator than glass, yet fiberglass is commonly used as an insulator in woodenbuildings. Why? 3. How does the high specific heat of water affect convection currents in the air at the seashore? 4. What is evaporation, and why is it a cooling process? Exactly what is...
HoMEWORK FOR INTRODUCTION TO HEAT AND TEMPERATURE 1. Approximately what is human body temperature on the...
HoMEWORK FOR INTRODUCTION TO HEAT AND TEMPERATURE 1. Approximately what is human body temperature on the Celsius temperature scale? Which is better at transferring heat, water or air? How does this fact explain the length of time it takes the temperature probe to reach thermal equilibrium with the air or water it is in? 2. 3. What effect does the evaporation of water have on the object from which it is evaporating? When has your body experienced this effect? 4....
Thermal Efficiency Internal Heat Energy AQ (J) Energy Lost (1) Material Work (J) Thermal Efficiency (%)...
Thermal Efficiency Internal Heat Energy AQ (J) Energy Lost (1) Material Work (J) Thermal Efficiency (%) Aluminum 89.89 63.55 26.34 70.70 Brass 49.09 39.74 9.35 80.95 3.) Show your work. Aluminum Energy Lost-89.89-63.55=26.34 J Aluminum Thermal Efficiency (%). e=q/w = 63.55/89.89x100=70.70% Friction Heating - 5 Brass Energy Lost- 49.09-39.74=9.35J Brass Thermal Efficiency..(%)-e=q/w = 39.74/49.09 x100=80.95% Results and Questions 1.) Give the equation you used to calculate the Power required to lift the mass. 2.) How did the internal energy change...
Answers and Solutions to odd-numbered exercises are in appendix 7 1. What atmospheric factors interact to...
Answers and Solutions to odd-numbered exercises are in appendix 7 1. What atmospheric factors interact to produce weather? 'Heat energy, wind, air pressure, and moisture 2. If heat energy is one of the atmospheric factors causing weather, what generates heat energy? 3. The Sun's energy that is absorbed by the surface of Earth is later released as what? infored Rays 4. What absorbs the energy released by the surface of the Earth? 5. If there were no greenhouse effect, how...
Just 1c, cant figure out how to calculate specific heat without the heat energy 1. Consider...
Just 1c, cant figure out how to calculate specific heat without the
heat energy
1. Consider the following data for aluminum, Cu, and an unknown metal Z. metal Z 10. Metal Mass (8) Specific heat (J/8°C) Initial temperature (°C) Final temperature (Al/Cu) Final temperature (AI/2) 10.0 0.900 40.00 51.25 48.50 CU 30.0 0.385 60.00 51.25 55.00 48.50 a) When Al and Cu are placed in contact with each other, the final temperature of the metals is 51.2°C. How much heat...
What is the influence of alcohol in the body? Please be specific and give at least...
What is the influence of alcohol in the body? Please be specific and give at least 2 influences, ie influence in the GI tract, etc. Please be sure to enumerate these (so there is no confusion), ie. (1) and (2). Please also give 2 examples of alcohol's damage. Talk about at least 1 short-term effect and 1 long-term effect. Lastly, give your views on alcohol consumption and why you feel the way you do. You must complete at least 10...
What modern day factors increase the risk of cancer? In your own words, explain the effect...
What modern day factors increase the risk of cancer? In your own words, explain the effect of physical activity on cancer risk. How would you explain the benefit of physical activity to someone who is living with/surviving cancer? What can changes can you make, if any, to reduce your personal risk for cancer? What do you believe is the #1 reason most people are not physical activity? Share a strategy for overcoming this challenge. (this is a general physical activity...
Explain what effect the following scenarios would have on the calculated specific heat (i.e. would it...
Explain what effect the following scenarios would have on the calculated specific heat (i.e. would it be calculated artificially high, low, or have no effect). Your explanation should address what variable(s) would be affected by the scenario and how that affects the calculation of specific heat.(1.5pt each) A student accidently dropped the piece of metal on the countertop during the process of transferring it from the boiling water bath to the calorimeter, but was quickly picked up and put into...
Consider a solid body having mass m, volume V, density = 10000 kg/m3 , specific heat...
Consider a solid body having mass m, volume V, density = 10000 kg/m3 , specific heat capacity at constant pressure Cp = 600 J/(kg.K), and its initial temperature Ti = 200oC. Assume the system losses heat to the environment by convection at temperature T = 40oC and heat transfer coefficient h = 12 W/(m2 .K). (a) Start with applying the energy balance, and use the concept of the simplified lumped system analysis to derive an expression for the change of...
2. Consider going for a walk on a cold fall day. Why do you feel colder if the wind is blowing than if it is not?
HoMEWORK FOR INTRODUCTION TO HEAT AND TEMPERATURE 1. Approximately what is human body temperature on the Celsius temperature scale? Which is better at transferring heat, water or air? How does this fact explain the length of time it takes the temperature probe to reach thermal equilibrium with the air or water it is in? 2. 3. What effect does the evaporation of water have on the object from which it is evaporating? When has your body experienced this effect? 4....
Thermal Efficiency Internal Heat Energy AQ (J) Energy Lost (1) Material Work (J) Thermal Efficiency (%) Aluminum 89.89 63.55 26.34 70.70 Brass 49.09 39.74 9.35 80.95 3.) Show your work. Aluminum Energy Lost-89.89-63.55=26.34 J Aluminum Thermal Efficiency (%). e=q/w = 63.55/89.89x100=70.70% Friction Heating - 5 Brass Energy Lost- 49.09-39.74=9.35J Brass Thermal Efficiency..(%)-e=q/w = 39.74/49.09 x100=80.95% Results and Questions 1.) Give the equation you used to calculate the Power required to lift the mass. 2.) How did the internal energy change...
Answers and Solutions to odd-numbered exercises are in appendix 7 1. What atmospheric factors interact to produce weather? 'Heat energy, wind, air pressure, and moisture 2. If heat energy is one of the atmospheric factors causing weather, what generates heat energy? 3. The Sun's energy that is absorbed by the surface of Earth is later released as what? infored Rays 4. What absorbs the energy released by the surface of the Earth? 5. If there were no greenhouse effect, how...
Just 1c, cant figure out how to calculate specific heat without the
heat energy
1. Consider the following data for aluminum, Cu, and an unknown metal Z. metal Z 10. Metal Mass (8) Specific heat (J/8°C) Initial temperature (°C) Final temperature (Al/Cu) Final temperature (AI/2) 10.0 0.900 40.00 51.25 48.50 CU 30.0 0.385 60.00 51.25 55.00 48.50 a) When Al and Cu are placed in contact with each other, the final temperature of the metals is 51.2°C. How much heat...
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