Recent content by uma maheswary m

  1. U

    A sample of U²³? (half-life=4.5×10?) yr ore is found to contain 23.8g of U²³? and 20.6

    A sample of U²³? (half-life=4.5×10?) yr ore is found to contain 23.8g of U²³? and 20.6 of Pb²??. Calculate the? age of the ore.
  2. U

    If a, b, c are the sides of a scalene traingle, then the expression (b + c - a)(c +

    a - b)(a + b - c) - abc is? (i) non positive (ii) non negative (iii) positive (iv) negative Please explain! thanks in advance :)
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