Yarns made of the tiny straws of carbon called nanotubes have an astounding ability to twist as they contract, scientists have found
The team of researchers from Australia, the US, Canada and South Korea demonstrated motors that could spin at nearly 600 revolutions per minute, turning a weight 2,000 times heavier than the yarn itself.
Categories: Plus Two Physics Tags: astounding ability, bfe, carbon, de, minute, post, revolutions per minute, south korea, straws, Temporary, theme, twist, weight, yarns
Problem from relative velocity
A Boat covers certain distance between two spots in a river taking t1 hrs going downstream and t2 hrs going upstream. What time will be taken by boat to cover same distance in still water? posted by STUTI Answer: Incoming search terms:relative velocity...
Categories: Ask Physics, frac, KINEMATICS, Project Tags: answer, boat, distance, latex, numericalsLink, Physics, post, problem, relative motion, relative velocity, search terms, speed, time, velocity, water
Collection of Problems received from Class 12 Physics
These problems were posted by Geena. Hope that we will be able to post the answers to these questions soon; each in a separate post. By the time visitors can attempt to post their answers as comments to this post. (Only selected posts will be published) Please note that the answers are not published until the [...]
Categories: Ask Physics, charge density, Electromagnetism, Interesting Questions, potential drop, Project, time answers Tags: ammeter, AskPhysics, cell, charge density, internal resistance, Physics, physics teachers, post, potential drop, problem, proton, question, time answers, wire
A simple numerical on momentum
Car mass is 1200 kg moving velocity is 108 km/hr. On applying brakes velocity reduced to 36 km/hr. Find change in momentum? (posted by Aditi) Answer: m=1200 kg u=108 x 5/18=30m/s v=36×5/18=10m/s Change in momentum = m(v-u) = 1200 x (30-10)=1200 ...
Categories: Ask Physics, brakes, Force, Mechanics, Project Tags: 10m, Aditi, answer, brakes, car, change, mass, momentum, Physics, post, search terms, speed, velocity
A simple numerical on momentum
Car mass is 1200 kg moving velocity is 108 km/hr. On applying brakes velocity reduced to 36 km/hr. Find change in momentum? (posted by Aditi) Answer: m=1200 kg u=108 x 5/18=30m/s v=36×5/18=10m/s Change in momentum = m(v-u) = 1200 x (30-10)=1200 ...
Categories: Ask Physics, brakes, Force, Mechanics, Project Tags: 10m, Aditi, answer, brakes, car, change, link, mass, momentum, Physics, post, speed, velocity
Numerical Problem from Friction
“The friction coefficient between a road and the tyre of a vehicle is 4/3.find the maximum incline the road may have so that once hard brakes are applied and the wheel starts skidding,the vehicle going down at a speed of 10m/s is stopped within 5m”...
Categories: Ask Physics, banking, brakes, Force, friction coefficient, friction forces, Mechanics, Project, roads, skidding, tyre, wheel Tags: 10m, brakes, coefficient, friction, friction coefficient, numerical, numerical problem, Physics, post, speed, tyre, vehicle, wheel
Direction of magnetic field due to a current carrying conductor
“How do we know the direction of magnetic field around the current carrying conductor?” Asked Nikhil Incoming search terms:direction of magnetic field around a current carrying conductorDIRECTION OF MAGNETIC FIELD IN CURRENT CARRYING CONDUCTORmagne...
Categories: Ask Physics, Current Electricity, Electromagnetism, Magnetism, Project Tags: carrying, conductor, conductorDIRECTION, current, direction, electric current, field, fieldLink, magnet, magnetic effect, magnetic field, Physics, post, search terms
