Template for the Electrical and Computer Engineering Department of Northeastern University. Communications, Control, and Signal Processing Qualifying Exam.

The impact crater of a small metal ball of 63.7 grams (0.0637kg) is dropped from 8 different heights, ranging from 0.20m to 0.90m was observed. A mean was measured for the craters diameter. Using the equation E=mg$\Delta$h given that we have m, and g is a constant of 9.81 we can find the kinetic energy of the ball on impact. The relationship between crater diameter, D, and impact energy, E, is given by D=kE$^n$ where K is constant and n is found by the gradient of the graph and is also constant. This can be modified to give $\log D = n\log E + \log k$.

The purpose of this lab is to determine the spring constant of a given spring. This spring constant is given by the relation between the force exerted on the spring and the distance the spring is either stretched or compressed. This relationship is given through Hooke’s law which we are going to get a better understanding of throughout this lab.

Nuclear Science and Techniques (NST) is an international, peer-reviewed scientific journal sponsored by Shanghai Institute of Applied Physics, Chinese Academy of Sciences and the Chinese Nuclear Society. It was established in 1990 as a quarterly journal and had been changed to a monthly frequency in 2017. The journal is devoted to applied nuclear physics; fundamental study of nuclear energy; application of nuclear techniques in various fields; radiochemistry and radiation chemistry; nuclear instruments and methods. The publication of the journal is aimed at enhancing academic exchange between Chinese and foreign scientists, and at promoting development of nuclear science and techniques and their applications. NST has been indexed by SCI-E, CA in US, SA in UK and РЖ in Russia. The editor-in-chief is Prof. Yu-Gang Ma.