Joseph made a poster for his Earth science project. He included the following diagram to show how Earth's surface recieve solar energy. Which process is involved when solar energy warms the surface of Earth? a) conduction b) convection c) radiation d) reflection
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- 1. Would air at the same temperature feel the same? Why or why not? 2. Would your perceptions have changed if the cold water was 0° C and the warm water was 80°C? 3. . Why would it be important to be able to perceive the difference between 45°C and 80°C?2. An aluminum pot is left outdoors in the hot sun. As the pot’s temperature increases, which of the following statements about the inner and outer circumferences of the pot is true? A. Both the outer and the inner circumferences will increase. B. The outer circumference will increase, but the inner circumference will not change. C. The outer circumference will increase, but the inner circumference will decrease. D. The outer circumference will not change, but the inner circumference will decrease.7. Modified Multiple Choice. Write the letter of the best option and provide an explanation on your answer. 50755. Which corresponds to the refrigerator statement of the second law of thermodynamics? A refrigerator: A. is a cooling device. B. is the opposite of a heat engine in terms of its operation. C. needs electricity to make the foods and drinks in it cooler. D. can be used to lower the temperature of foods and drinks stored in it.
- How does the rate of heat transfer by conduction change when all spatial dimensions are tripled?Energy in Thermal Processes Multiple choices 1-54. When you boil water in a pot on the stove, which heats faster, the metal or the water? Explain. 5. Why do you think different substances heat up and cool down at different rates? 6. Based on the definition above, which of the 4 substances do you think has: a) the highest specific heat capacity? b) the lowest heat capacity? 7. Here are the heat capacities of the four substances: 4.18 J/g °c, 1.00 J/g °c, 0.80 J/g °c, and 0.60 J/g °c. Match and then label each substance with its specific heat capacity on the graph.
- Q7.2- The temperature of the sun is about (6000) and its emissivity is equal to one unit. What is the radiant power of the sun in terms of watts per square meter? If the radius of the sun is 7 x 108 m, what is the total radiant power of the sun? TnWhat causes thermal energy transfer? A. The difference in mass of substances. B. The size in substances. C.yet not known. D. Vibration of substances when heated?
- The same heat transfer into identical masses of different substances produces different temperature changes. Calculate the final temperatures when 1 kcal of heat transfers into 1.5 kg of the following, originally at 21°C. Hint a. Into water: the final temperature of water is °C. b. Into concrete: the final temperature of concrete is °C. c. Into steel: the final temperature of steel is C. d. Into mercury: the final temperature of mercury is °C.2. A bowl of water has a temperature of 50°C. It is put into a refrigerator where the temperature is 5°C. After 0.5 hours, the water is stirred and its temperature is measured to be 20°C. It is then left to cool further, take t in Newton's law of cooling to be measured in minutes. Use Newton's law of cooling to predict when the temperature will be 50°C.3.Newton’s law of cooling states that the temperature of an object changes at a rate proportional to the difference between its temperature and that of its surroundings. Suppose that the temperature of a cup of coffee obeys Newton’s law of cooling. If the coffee has a temperature of 200◦F when freshly poured, and 1 min later has cooled to 190◦Fin a room at Tm◦F, determine when the coffee reaches a temperature of 150◦F. Use Tm= 80