Answer: Mendeleev arranged the elements in his periodic table in <em>order of increasing atomic mass.</em> In the modern periodic table, elements are arranged <em>in order of increasing atomic number</em>
There are always new questions to answer and new problems to solve in this area. The correct option is D.
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Before attempting to solve a problem, ascertain whether it is truly a problem. In addition to you, but additionally to those who are affected.
In this line of work, there are always fresh questions to answer and problems to solve.
Thus, the correct option is D.
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Answer:
VR = 0.26 m/s
Explanation:
m = 0.1 kg M = 0.1 kg
v = 0.31 m/s Vi = 0 m/s
the kinetic energy of the system initially is:
Ki = 1/2×m×(v^2) + 1/2×M×(Vi)^2
= 1/2×(0.1)×(0.31)^2
= 4.805×10^-3 J
then, we told that the system after collision only retains a fraction 0.69 of its initial kinetic energy. that is the final kinetic energy of the system is:
Kf = 0.69×4.805×10^-3 J
= 3.31545×10^-3 J
but due equal masses of the bodies, we know that after the collision the only body that would be in motion would be the body that at res and the body that was initially moving will now be at rest.so the kinetic energy is only made by the second body and given by:
Kf = 1/2×M×(VR)^2
3.31545×10^-3 = 1/2×(0.1)×(VR)^2
VR^2 = 0.066309
VR = 0.26 m/s
according to the coservation of linear momentum:
