In the air, there's nothing holding the body of the helicopter still - so the rotor blades spin one direction, but the torque applied to spin the rotors tries to spin the body of the helicopter in the opposite direction. The little rotor on the tail helps keep the body of the helicopter pointed in the same direction.
2078-10-20
दाङ, नेपाल।
वरषीय सुशील भणडारीले आफनै गाउँमा सफलतापूरवक
सवचालित कार बनाएका छन ।दिएको जानकारी अनुसार
कारमा सुशीलले समाचार अधिकारीहरूलाई अनय कचचा
पदारथ जसता उपलबधयसको कषमता लगभग 15-20 किमी
/ घणटा छ। यो परियोजनाले उनलाई करिब रु.95,000
अवधि-चार महिना; भणडारी भनछन, ‘ किनन सकने गरी थप गरन
सकौं कम मूलयमा।”
Balance on a bicycle is a matter of constantly correcting against falls, and it's easier when the speed is higher because the inertia of moving forward overcomes the need for corrective actions.
Sigma bond is stronger than Pi bond because of the following reasons:
- The extent of overlapping in Sigma bond is greater than in Pi bond.
- The electron density in intermolecular axis is more in Sigma bond than in Pi bond.
- There is free rotation of atom about Sigma bond but not about Pi bond.
Dextrorotatory and dextrorotation are terms used in chemistry to describe the direction in which a substance rotates plane-polarized light. When a substance is said to be dextrorotatory, it means that it rotates plane-polarized light to the right or clockwise direction, whereas when it is levorotatory, it rotates plane-polarized light to the left or counterclockwise direction.
The terms "dextrorotatory" and "levorotatory" come from the Latin words "dexter" meaning "right" and "lævus" meaning...
