How many minutes will elapse
The half-life of oxygen -15 is 124 seconds. If a sample of oxygen-15 has an activity of 4000 becquerels, how many minutes will elapse before it reaches an activity of 500 becquerels?
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Develop the explicit finite difference formulation for this wall for the case of no heat generation but with the indicated solar flux.
If the initial concentration of chlorine is 0.030 M and of bromine monochloride is0.020 M, what is the equilibrium concentration of bromine?
A bicycle wheel, of radius 0.34 m and mass 3 kg (concentrated on the rim), is rotating at 4.14 rev/s. After 45 s the wheel comes to a stop because of friction. What is the magnitude of the average torque due to frictional forces?
If the turbine has an isentropic efficiency of 60%, determine the work out of the turbine and the exit temperature of the fluid and quality if applicable.
Assume constants m=.001kg, Cv=.8, k=1.4, T1=300K, and T3=2000K. Plot work as a function of compression ratio r and determine the r that yields maximum work.
A 3.00 g sample of a mixture contains copper and zinc. Zinc reacts with HCl according to the equation show below, but copper does notreact with HCl.
A study involving 36 subjects randomly assigned six each to six treatment groups gives an ANOVA F test with p value = 0.085. What multipliers are used to construct 95% confidence intervals for treatment differences with the following methods:
If I MeV of energy is deposited in an anthracene crystal and 2000 scintillation photons are produced, what is the scintillation efficiency?
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