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1. An observer stands 600 meters from the launch pad of a rocket, watches it ascend vertically at 100 m/s.
a. Find the rate of change of the distance between the rocket and the observer. (Hint: Use Pythagorean Theorem)
b. Find the distance between the observer and the rocket when the rocket is 400 meters high.
c. What is the rate of change of the distance between the rocket and the observer when the rocket is 400 meters high?
One example of a nuclear fission reaction involving slowly moving neutrons is
1/0n + 235/92 U ---> 236/92 U* ---> 95/42 Mo + 139/57 La + (2) 1/0n
What is the total kinetic energy (in eV) of the products of the reaction? The relevant masses are:
235/92 U = 235.043 924 u; 95/42 Mo - 94.9058 u; 139/59 La = 138.9061 u, and 1/0n = 1.0087u
spectroscopic term symbol for He
What is the error in electronic balance
what is the atomic spacing between two iron atoms?
Two body of mass 10kg and 4kg are moving at opposite direction with the same velocity of 5m/s. If they collide together after their collision, calculate their common velocity
state one thing that is the same for atoms of both isotopes
The half-life of a radioactive nuclear source is 9 days. What fraction of nuclei is left
undecayed after 3 days.
State whether the β – transition 1/2+ → 1/2-
is allowed or forbidden. Mention the degree of
forbiddenness in case of forbidden transition.
An ancient beam of wood is discovered during an archiological dig and carbon dated. They find that the sample contains 12.5% of the count rate of a similar mass of living wood. The half-life of the carbon isotope is 5600 years. Calculate the age of the ancient wood.
