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In experiment 1, a cyclic voltammogram at an HMDE was obtained from a 0.167-mM solution of Pb2+ at a scan rate of 2.5 Vis. In experiment 2, a second CV is to be obtained from a 4.38-mM solution of Cd2+ using the same HMOE. What must the scan rate be in experiment 2 to record the same peak current in both experiments if the diffusion coefficients of Cd2 and Pb2+ are 0.72 X 10-5 cm2 s-1 and 0.98 cm2 s-1, respectively. Assume that the reductions of both cations are reversible at the HMDE.
A helical spring is to be constructed from a 4340 steel. The design calls for 5 coils, a coil-to-coil diameter of 12 mm, and a wire diameter of 3 mm.
The actual (irreversible) components of a small Brayton cycle gas-turbine engine are shown. The cycle pressure ratio is 15 and the maximum turbine temperature is 1600 K. The turbine and the compressor are insulated and have isentropic efficiencies of..
a stone is thrown vertically upward from a bridge located 40 m above the water. knowing that it strikes the water 4 s
a car travels along a road which for a short distance is defined by r200theta ft where theta is in radians. if it
a can of juice consists of .06 kg of aluminum and .355 liters of liquid. consider the contents to be saturated liquid
Calculate the resulting uncertainty in ωn al L =1.0 and L =4.0 in - What is the frequency of the signal? In order to properly sample and reproduce the characterstics of the signal in digital form, what should be the minimum sampling frequency and w..
what is the human development index? suppose the world population in year 2100 will be 9 billion people. assume the
water is used in a regenerative power cycle where the standard rankine cycle is augmented with one closed feed water
A 5-kg uniform square plate is supported by two identical 1.5-kg uniform slender rods AD and BE and is released from rest in the position θ = 45°. Knowing that the angular velocity of AD as it passes through the vertical position is 5.2 rad/s, det..
A mixture is composed of 2 mol of CO2 and 4 mol of N2 is compressed adiabatically in a cylinder, from 100 kPa and 20C to 2MPa.
1 a 300 hp 223.71 kw truck engine consumes fuel at a rate of 10.567 gallons every hour 40 lh. the fuel has a heating
If the specific enthalpy of nitrogen is given by the formula H (kJ/kg) = 1.04 [T (°C) - 25] what is the volumetric flow rate of the gas (L/s) upstream of the heater (i.e., at 30°C and 110 kPa)?
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