QUESTION 7 Name four (4) factors that affect the amount of radiation received by a surface A from another surface (or source) B? For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). T TT Arial AEC 3 (12pt)

(a) Where can lightning take place? (Where can it begin and end?) (b) Describe what is meant by heat lightning and a bolt from the blue.

Part A A 5.00-m-diameter garden pond is 0.400 m deep. Solar energy is incident on the pond at an average rate of 400 W/m?. If the water absorbs all the solar energy and does not exchange energy with its surroundings, how many hours will it take to warm from 16.0°C to 28.0°C ? ? 13.53 hours Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Review your calculations and make sure you round to 3 significant figures in the last step.

Two stars, A and B, have the same emissivity, but the radii and surface temperatures are different with RA = 0.5RB, and TA = 2TB. Assuming the temperature of space to be negligible, which star radiates the most energy per unit time? a. Star Ab. Star Bc. Both radiate the same amount of energy per unit time.d. More information is needed in order to make a determination.

h= = 10 100 m² °q 3- Radiation heat transfer: This is when heat is transferred by radiating off of an object. • All bodies send out energy in the form of electromagnetic radiation. • The wavelength and intensity is dependent on the temperature of the surface. • Radiation may be transferred through vacuum, but also through air. HW1 The inner surface of a plane brick wall is at 60°C and the outer surface is at 35°C. Calculate the rate of heat transfer per m of surface area of the wall, which is 220 mm thick. The thermal conductivity of the brick is 0.51 W/m°C. HW2 A reactor's wall 320 mm thick, is made up of an inner layer of fire brick (k = 0.84 W/m°C) covered with a layer of insulation (k = 0.16 W/m°C). The reactor operates at a temperature of 1325°C and the ambient temperature is 25°C. (i) Determine the thickness of fire brick and insulation which gives minimum heat loss. (ii) Calculate the heat loss presuming that the insulating material has a maximum temperature of 1200°C. HW3 Q1 A…

1 A student was cooking chiken in the frying pan below. What transfer of heat between the pan and the chicken is responsible for cooking the chicken? A radiation B convection Ce lectrical conduction

4. Think about the bimetallic strip in we discussed in class. Consider a strip that is formed from bonded layers of two materials of your choice. Estimate how long the strip needs to be to produce a measurable deflection given a 10C temperature change.

4 / 12 91% + hold a piece of copper wire over the flame of a If you wooden match, heat will be conducted by the copper wire to your fingers, and you will be forced to drop the wire. You will, however, still be able to hold the match because wood is a poor conductor of heat. 3. Which of the following is implied in the passage above? A. Copper is a good conductor of heat. B. Wood and copper conduct heat equally. C. Wood is an excellent conductor of heat. D. Matches should be made of copper. ACCUPLACER Englishhasa Secund Language (ESL) TesIS

Identify the mode(s) of heat transfer when a person is placing their hand above (but not touching) a hot burner. I. Conduction II. Convection II. Radiation Answer Options: A)land II B) Il and III C) I and III D) All of the above E) None of the above

At what net rate does heat radiate from a 326-m2 black roof on a night when the roof's temperature is 30.0°C and the surrounding temperature is 15.2°C? The emissivity of the roof is 0.900. *Answer in kW please