The near point (the smallest distance at which an object can be seen clearly) and the far point (the largest distance at which an object can be seen clearly) are measured for six different people. near point far point
(cm) (cm)
Avishka 40 ?
Berenice 30 300
Chadwick 25 500
Danya 25 ?
Edouard 80 200
Francesca 50 ?
A) Which, if any of these people are nearsighted (myopic)?
B) Which, if any, of these people require bifocals to correct their vision?
C) Which, if any, of these people's vision can be corrected using only converging lenses?

tube or goog with be a great resource to with that question

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

the maxium height is 34m/s