
 👍 0
 👎 0
posted by DrBob222
Respond to this Question
Similar Questions

chemistry
The radius of a strontium atom is 215 pm. How many strontium atoms would have to be laid side by side to span a distance of 2.66 mm?
asked by Anonymous on January 23, 2017 
chemistry
Strontium has density of 2.64 and crystallizes with the facecentered cubic unit cell. Find the radius of the strontium atom
asked by hannah on July 10, 2011 
math
Suppose strontium90 decays at a rate of 2 percent per year. (a) Write the fraction P of strontium remaining, as function of t, measured in years. (Assume that at time t=0 there is 100 % remaining.) Answer: P(t)=(.98)^t (b)
asked by mac on September 14, 2017 
Math
The element strontium90 is radioactive. The percent of strontium 90, A(t), left in a sample can be modelled by the halflife function A(t) = A0 (1/2)^t/29, where t represents the time, in years, after the initial time, and A0
asked by Emma on May 31, 2017 
Chemistry
The halflife for beta decay of strontium90 is 28.8 years. A milk sample is found to contain 10.3 ppm strontium90. How many years would pass before the strontium90 concentration would drop to 1.0 ppm?
asked by Mindy on November 11, 2011 
Calculas
In the early 1960s, radioactive strontium90 was released during atmospheric testing of nuclear weapons and got into the bones of people alive at the time. If the halflife of strontium90 is 32 years, what fraction of the
asked by Cratch on August 26, 2010 
calculus
In the early 1960s, radioactive strontium90 was released during atmospheric testing of nuclear weapons and got into the bones of people alive at the time. If the halflife of strontium90 is 27 years, what fraction of the
asked by jessica on July 3, 2012 
calculus
Suppose strontium90 decays at a rate of 2 percent per year. (a) Write the fraction P of strontium remaining, as function of t, measured in years. (Assume that at time t=0 there is 100 % remaining.) Answer: P(t) = (b) Estimate the
asked by Anonymous on June 27, 2014 
NEED HELP WITH CALC
Suppose strontium90 decays at a rate of 2 percent per year. (a) Write the fraction P of strontium remaining, as function of t, measured in years. (Assume that at time t=0 there is 100 % remaining.) Answer: P(t) = (b) Estimate the
asked by Anonymous on June 27, 2014 
Math
Suppose strontium90 decays at a rate of 2 percent per year. (a) Write the fraction P of strontium remaining, as function of t, measured in years. (Assume that at time t=0 there is 100 % remaining.) Answer: P(t) = (b) Estimate the
asked by Anonymous on June 27, 2014