somewhat ka koi bulb Pratidin do ghante Jalta Hai Aur 40 wat ke 2 Vidyut per 4 ghante Jalte Hain 30 Dinon Mein upyog Urja KW Ganja Mein gyat kijiye​

The material that keeps its new shape after it is stretched is called?

In a good thermo flask the main cause of heat loss is

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.