The accommodation limits for a nearsighted person's eyes are 20.0 cm and 60.0 cm. that is, this person's unaided eye has a near point of 20.0 cm and a far point of 60.0 cm. when this person wears his glasses, he can see faraway objects clearly. what is the closest distance at which he can see objects clearly when wearing his glasses?

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

an electric circuit

d) physical means can be used to separate the components of air.

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