NUMERICAL UNIT 9" TRANSFER OF HEAT" CLASS 9 PHYSICS KPK BOARDS.

LINK OF PLAYLIST OF NUMERICAL CLASS 9 PHYSICS    • NUMERICAL CLASS 9 PHYSICS   LINK OF PLAYLIST OF CLASS 9 PHYSICS CONCEPTUAL    • CONCEPTUAL  CLASS 9 PHYSICS   LINK OF PLAYLIST OF CLASS 9 PHYSICS    • PHYSICS CLASS 9   LINK OF PLAYLIST OF CLASS 9 MATH    • MATH CLASS 9   NUMERICAL UNIT 9" TRANSFER OF HEAT" CLASS 9 PHYSICS KPK BOARDS. Q1. a person's body is covered with 1.6m² wool clothing . the thickness of the wool is 2.0 x10²m. the temperature at the outside surface of the wool is 11C°, and the skin temperature is 36C°. how much heat per second does the person lose due to conduction? thermal conductivity of wool is k=0.04Wm⁻¹k⁻¹ Q2. the external wall of a brick house has an area of 16 m² and thickness 0.3 m. the temperature inside and outside the house has respectively 20C° and 0C°. calculate the rate of heat loose through the wall. thermal conductivity a brick is k=O.84Wm⁻¹k⁻¹ Q3. window glass has thermal conductivity of 0.8Wm⁻¹k⁻¹. calculate the rate at which heat is conducted through a window of area 2.0m² and thickness 4.0 mm. the temperature inside and air conditioned room is 20C° the outdoor temperature is 35C° EHTISHAM TARIQ LECTURER IN WARSAK MODEL SCHOOL AND COLLEGE. PLEASE SUBSCRIBE OUR CHANNEL"EHTISHAM TARIQ WMSC PESHAWAR" FOR GETTING NOTIFICATIONS OF NEW VIDEOS. #class9 #physicsclass9th #physicsclass9 #numericals #numericalphysics #physicsnumericals #physicsnumericalclass9