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Compute algebraically the resultant of the
following coplanar forces: 100 N at 30O
, 141.4
N at 45O
, and 100 N at 240O
. Check your
answer graphically.
Cobalt-60, with a half-life of 5.3 years, has a number of
applications, including medical therapy and the sterilization
of medical tools. Determine the mass of a 50 g sample that
would remain after
(a) 6 months
(b) 5 years
How much energy is required to remove one
proton from the nucleus of A = 16, Z = 8, Oxygen? A rough answer
to this question is obtained by giving the binding
energy per nucleon. A better answer is obtained
when we write a reaction that removes a proton
from the nucleus. In this case 16
8O → 1 1p + A = 15. Z= 7, Nitrogen.
Calculate the energy required for this reaction
to take place, known as the proton separation
energy. Compare the two energy values. (The
atomic mass of oxygen is 15.994 u; that of
nitrogen is 15.000 u.)
Find the binding energy and binding energy per
nucleon of the nucleus 62 = A, Z = 28, Nickel . The atomic mass of nickel is 61.928348 u. Please explain step by step.
A moon rock has 3 % of its original Al-26 mass. K/U T/I C
(a) Determine the age of the moon rock.
(b) Discuss any assumptions that must be made when
using this method of dating.
Aluminum-26, which decays into magnesium-26, has a half-life
of approximately 720 000 years. Use this information to answer
Questions 6 and 7.
6. (a) What type of decay does Al-26 undergo?
(b) Does Al-26 decay in the same way as C-14?
Explain.
What type of radioactive decay is involved in carbon
dating? Explain the process of carbon dating.
Cobalt-60, with a half-life of 5.3 years, has a number of
applications, including medical therapy and the sterilization
of medical tools. Determine the mass of a 50 g sample that
would remain after
(a) 6 months
(b) 5 years
Factors affecting pressure in liquids
how would you relate alchemy to synthesis of new elements
