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.

A3#Estimate the power per unit area of thermal radiation emitted by the Sun.

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.

78a

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

Which of the following is NOT an example of a real-life example or application of radiation? A thermos will sometimes have a vacuum layer with no air or other material inside. People who fall into icy water are given shiny, reflective blankets. It's warmer when the lights are on in your home than when they're off. A person Sun-bathing. A thermos flask has a mirrored surface.