As the velocity of a rocket in a circular orbit near a black hole increases, the outwardly directed rocket thrust must increase to keep the rocket in its orbit. This feature might appear paradoxical from a Newtonian viewpoint, but we show that it follows naturally from the equivalence principle together with special relativity and a few general features of black holes. We also derive a general ...

BACKGROUND Brucellosis is a major bacterial zoonosis of global importance with the causative organisms of Gram-negative facultative intracellular pathogens. The aims of this study were to standardize two immunoelectrophoretic techniques, rocket and cross immunoelectrophoresis, and compare their results with other conventional serodiagnostic tests. METHODS Sera from 15 sheep, without any histo...

This article aims at studying sounding rocket (SR) class, or those vehicles launched from the earth and carrying out various experiments high altitudes. After end of their mission, rockets should deliver a payload to given point give range.
 In general, design tasks are divided into direct inverse ones. paper focuses on designing tasks. this respect, set values maximum range, mass restrict...