3. Teniendo en cuenta los datos de una distribución simple de una población, como se muestra en la siguiente tabla, cuya media aritmética (µ)= 11,2. Determine la desviación estándar.

Positrons are spontaneously emitted from the nuclei of

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.

If you put a helium-filled balloon in the refrigerator, what will happen?