Jm 8 2070 (Bhadra) Q. No. 23 What force would be required to stretch a wire of 3 x 10-4 m2 cross
-section, so that its length becomes 2.5 times original length? [Y = 3.6 1012 dyne cm2]
Ans: 1.62 x 10 N
What stress would cause a wire to ip​

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me