Engineering and Science

A rocket is a missile, spacecraft, aircraft or other vehicle that obtains thrust from a rocket engine. Rocket engine exhaust is formed entirely from propellants carried within the rocket before use. Rocket engines work by action and reaction. Rocket engines push rockets forward simply by throwing their exhaust backwards extremely fast. Rockets are relatively lightweight and powerful, capable of generating large accelerations and of attaining extremely high speeds with reasonable efficiency. Rockets are not reliant on the atmosphere and work very well in space. We don’t need more technical details for making our simple rocket, leave all it behind & lets see how to make a simple rocket using balloon. MATERIALS REQUIRED One long balloon One string One plastic straw Electrician Tape PROCEDURE Tie one end of string to any where you want your rocket to launch (it can be a chair, window bars or something you find suitable). Now insert the straw through other side of the s...

Simply a DC Motor is a device which convert electrical energy into mechanical energy. A DC motor is a mechanically commutative electric motor powered from direct current (DC). The stator is stationary in space by definition and therefore the current in the rotor is switched by the commutator to also be stationary in space. This is how the relative angle between the stator and rotor magnetic flux is maintained near 90 degrees, which generates the maximum torque. DC motors have a rotating armature winding (winding in which a voltage is induced) but non-rotating armature magnetic field and a static field winding (winding that produce the main magnetic flux) or permanent magnet. Different connections of the field and armature winding provide different inherent speed/torque regulation characteristics. Its operation is based on simple electromagnetism. A current-carrying conductor generates a magnetic field, when this is then placed in an external magnetic field,it will experience a force p...