`sqrt1620=?`

With what least number (integer) the following numbers are to be divided so that they become perfect squares. 1620

Express 1620 in roman numbers.

A radioactive sample consists of two isotopes one of then decays by alpha- emission with a half life of tau_(1)=405s and the other one decays by beta emission with half life of tau_(1) =1620s . At time t=0, probabilities of getting alpha and beta particles from the sample are equal. (a) If a particle coming out of the sample is detected at t=1620s, what is the probability that it is alpha particle? (b) Find the time when total number of surviving nuclei is half the initial quantity. Given If x^(4)+4x-2.5=0 then x=0.59 "log"_(10)2=0.301, "log"_(10)5.9=0.774

If angles A and B satisfy sqrt(2)cosA = cosB + cos^(3)B and sqrt(2)sinA = sinB- sin^(3)B , then the value of 1620 sin^(2) (A-B) is ……………..

If angles A and B satisfy sqrt(2)cosA = cosB + cos^(3)B and sqrt(2)sinA = sinB- sin^(3)B , then the value of 1620 sin^(2) (A-B) is ……………..

If the half life of radium is 1620 years then its decay constant is

If the half life of radium is 1620 years then its decay constant is

The half life of radium (226) is 1620 years. The time takend to convert 10 g of radium to 1.25 g is a. 810 years b. 1620 years c. 3240 years d. 4860 years