The paper gives two examples of simulating motion with spreadsheets, which are projectile motion in vacuum, and projectile motion in the air with quadratic drag.

Experimental values of N/Z equilibration were calculated by the method developed by A. Keksis [1]. The isobaric yield ratios for the A=3,6,7,11,14,16 isobars were calculated from reactions of Ca beams on Sn targets. These isobar yield ratios were then plotted individually versus the N/Z of the quasi-projectile (QP) for the four systems. The (N/Z)QP was assumed to be a straight mixing between th...

Synovial or ganglion cysts are uncommon lesions that may occur within the spinal canal. Over 50 reported cases have demonstrated a preponderant incidence at the L4-L5 level in association with degenerative hypertrophic facet changes ( 1, 2). The typical computed tomography (CT) appearance is that of an epidural lowdensity lesion adjacent to the degenerated facet joint that may or may not have a...

New analytical formulas for the electronic stopping power and the energy loss straggling of low velocity extended charge projectiles in the degenerate electron gas are calculated within the dielectric function method. The stopping and straggling effective charges Zeff of a projectile were analysed. They are found to differ one from the other and to depend on the electron gas density rs, on the ...

The rail gun is an electromagnetic device that converts electrical energy into mechanical energy for accelerating the projectile to hypervelocity. In order to accelerate the projectile between the conducting rails, it uses the magnetic field generated by the rail current. The rail gun consists of two parallel conductors called the rails that are bridged by a non-ferromagnetic conductor called a...

Traditional artillery guidance can significantly improve the attack accuracy and overall combat efficiency of projectiles, which makes it more adaptable to the information warfare of the future. Obviously, the accurate measurement of artillery spin rate, which has long been regarded as a daunting task, is the basis of precise guidance and control. Magnetoresistive (MR) sensors can be applied to...

the aim of this work is to find an efficient aerodynamic-based design algorithm for projectile fins and configuration shape optimization. three-dimensional supersonic flow over a projectile with fins at much number 5 and one degree angle of attack was studied. the runge-kutta method and multi-block technique was used to solve the governing equations. a basic configuration was assumed for the fi...