Aparticle moves along the x axis. its position as function of time is given by x=6.8t+8.5t^2, where t is in seconds and x is in meters. what is the acceleration as a function of time?

What type of electromagnetic wave is used in security pens? a. x-rays c. microwaves b. visible light d. ultraviolet radiation select the best answer from the choices provided

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?