Mass spectral measurements were made on 10 replicate low concentration Pb-EDTA samples: 190.5 190.5 , 146.2 146.2 , 160.9 160.9 , 175.9 175.9 , 144.9 144.9 , 214.3 214.3 , 165.9 165.9 , 170.5 170.5 , 159.9 159.9 , and 177.5 177.5 counts. Ten measurements of a blank had a mean measurement of 44.3 44.3 counts. A sample containing 3.00 3.00 μM Pb-EDTA gave a measurement of 1777 1777 counts. Estimate the signal and detection limit for Pb-EDTA.

What precautions should you take to prevent injuries when dealing with heavy loads?

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?