What fraction of original present at formation of earth
The age of earth is about 4600 million years. If half-life of 40K is 1.25*109yrs, what fraction of original 40K is present at formation of earth exists today?
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A piece of string 5.3M long consists of a mass of 15g. What should the tension in the string be to make, in a 125HZ wave, a wavelength 120cm long?
If 1.598 of TiO2 produces 1.438 g of Ti(x)O(y), determine the empirical formula of the new oxide? Titanium (IV) oxide (TiO2) is heated in the hydrogen gas to give a new titanium oxide, Ti(x)O(y) and water.
For such group of 12 companies, Determine the mean and standard deviation for number (among 12) that test for substance abuse. Using the results from part (c) and range rule of thumb, Determine the range of usual value
A person holds a rifle horizontally and fires at the target. The bullet consists of a muzzle speed of 200 m/s, and the person hear the bullet hit the target 1.70 s after firing it. The air temperature is around 72 degree F. Determine the distance
Determine the balanced molecular equation for the reaction? The Mn(2+), K+ and Na+ all react to form 3 different sulfate salts. Explain will the free electrons appear in the equation as reactants or products?
In the following condition determine the implied population. A recent report on the weekly news presented the findings of a study on the effectiveness of Onglyza, along with diet and exercise, for treating diabetes.
When the first wave hits a boundary among the two mediums traveling at 10 Km/sec at an angle of incidence of 40 degrees, causing the angle of refraction of 30 degrees. Compute its velocity in the second medium.
Discuss how much grams of barium phosphate will precipitate when 0.629g of sodium phosphate, molar mass of 380.2 and0.5279g of barium chloride, molar mass of 601.96 is mixed with the water to a volume of 500mL.
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