Answer:
2838
Explanation:
Answer:
A) Bohr’s work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels, like standing on the rungs of a ladder.
Explanation:
The change to the atomic model that helped solve the problem seen in Rutherford's model was the discovery of the strong nuclear force.
Rutherford's model required that the electrons be in motion. Positive and negative charges attract each other, so stationary electrons would fall into the positive nucleus. However, Rutherford's model failed to explain why electrons were not pulled into the atomic nucleus by this attraction. The change to the atomic model that helped solve this problem was the discovery of the strong nuclear force, which is much stronger than electrostatic interactions and holds the protons and neutrons together in the nucleus.
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b. energy barrier
c. collision group
d. transition state
Among the choices above, the one that is most closely related to an activated complex is the transition state. The answer is letter D. This formation forms quickly and does not stay in a way compound is. It usually forms during the enzyme – substrate reaction.
The career in the nuclear laboratory, atomic research centre is most concerned with the study of radioactive isotopes. Also the nuclear thermal power plant, advance military services weapon, research and development are concerned with the study of radioactive isotopes.
a. What is the efficiency of the light bulb? Give your answer as a percentage.
b. What do you think happens to the “lost” energy?
19. The work output is 300 joules for a machine that is 50% efficient. What is the work input?
20. A machine is 75% efficient. If 200 joules of work are put into the machine, how much work output does it produce?