## Use the Solver Statistics macro to obtain the standard deviations of the three concentrations.

Spectrum of a Mixture. The W-visible spectra of pure solutions of cobalt2+, nickel2′ and copper2+ salts, and of a mixture of the three, are given on the CD-ROM over the wavelength range 350-820 nm. Instead of using absorbance readings at only three wavelengths to calculate the concentrations of the three salts in the mixture, use the data at all 236 wavelength data points to calculate the three concentrations. Use the relationship A = E~C, where E, the molar absorptivity, is a dimensionless constant for a particular species at a particular wavelength, b is the light path length (1 .OO cm in this experiment) and c is the molar concentration. For the mixture, Aobsd = E~~C~~ + EN~CN~ + E~~C~~ at each wavelength. Use the Solver Statistics macro to obtain the standard deviations of the three concentrations.

### Calculate the maximum achievable bridge out-of-balance voltage for an applied torque T of 103 N m given the following

Four strain gauges, with specification given below, are available to measure the torque on a cylindrical shaft 4 cm in diameter connecting a motor and load. (a) Draw clearly labelled….

### Find the gain and phase characteristics of the maintaining amplifier.

A solid-state capacitive humidity sensor has a capacitance given by: C = 1.7 RH + 365pF where RH is the percentage relative humidity. The sensor has an associated parallel resistance….

### calculate the mean velocity of the gas at maximum flow rate

A pitot tube is used to measure the mean velocity of high pressure gas in a 0.15 m diameter pipe. At maximum flow rate the mean pitot differential pressure is….