How many millicuries of radioactivity are associated
How many millicuries of radioactivity are associated with a sample containing 5.10 mg Th (mass number of 229), which has a half-life of 7340 years?
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Based on an examination given to a large class in which the maximum score is 100 points, assume that 20 grades taken at random from the entire set produced the results that follow: 43 49 56 61 65 68 70 70 74 74 74 76 79 83 84 87 88 92 96 100. Dete
Four identical metallic objects carry the following charges: +1.29, +6.21, -4.54, and -9.14C. The objects are brought simultaneously into contact, so that each touches the others. Then they are separated. (a) What is the final charge on each objec
The standard recipe used in an exercise uses 3.0 mL of 0.25% phenanthroline solution in 100 mL of final solution to generate the red iron-phenanthroline complex which is determined colorimetrically.
Suppose .015 g of dichlorobenzene was combined with 10 ml ofdiethyl ether. This mixture was used to spot a TLC platecoated with silica gel and placed in a chamber of hexene.
Estimate the max. force required for extruding a cylindrical Al billet of 50mm dia and 75 cm long to a final dfiamter of 10 mm. The average tensile yield stress for Al is 170N/mm2.
If you have 5L of a 10M solution and wish to make 100 mLs of 0.01M, how many mLs of 10M solution would you use and how much water would you add to make the diluted solution?
A spherical balloon with a diameter of 6 m is filled with helium at 20°C and 200 kPa (absolute). Determine the number of moles of helium and the mass of the helium in the balloon.
Charges of 6.0 X 10^-7 C are each located at three corners of a square that is 1.0 m on each side. A charge of -1.3 x 10^-6 C is located at the other corner. What is the electric field at the center of the square
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