Electric charge can accumulate on an airplane in flight. you mayhave observed needle-shaped metal extensions on the wing tips andtail of an airplane. their purpose is to allow charge to leak offbefore much of it accumulates. the electric field around the needleis much larger than the field around the body of the airplane and, can become large enough to produce dielectric breakdown of the air, discharging the airplane. to model this process, assume that twocharged spherical conductors are connected by a long conductingwire and a charge of 22.0 µc isplaced on the combination. one sphere, representing the body of theairplane, has a radius of 6.00 cm, and the other, representing thetip of the needle, has a radius of 2.00 cm.(a) what is the electric potential of eachsphere? r = 6.00 cmvr = 2.00cmv(b) what is the electric field at the surface of each sphere? r = 6.00 cmv/m directionaway from the spheretoward the spherer = 2.00 cmv/m directiontoward the sphereaway from the spheredirections are toward and away from sphere

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented. b)scientists had not completely finalized their results, which took 30 years. c)cigarettes were cheaply available and media channels were very inefficient. d)cigarette manufacturers were trying hard to bring an alternative into the market

Jason and mia are both running in a race. as they approach the finish line, you being the physicist that you are decide to time how long it takes them to reach the end of the race. when you start your stop watch (you can take this as time t = 0 s) you notice that mia is an unknown distance d ahead of jason and both are moving with the same initial velocity v_0. you also notice that jason is accelerating at a constant rate of a_j, while mia is deaccelerating at a constant rate of -a_m. jason and mia meet each other for the first time at time t = t_1. at this time (t = t_1) jason's velocity is two times that of mia's velocity, meaning v_j (t_1) = 2v_m (t_1). a) draw the position vs. time graph describing mia's and jason's motion from time t = 0 to time t = t_1. clearly label your axes and initial conditions on your graph. b) draw the velocity vs. time graph describing mia and jason's motion from time t = 0s to time t = t_1. clearly label your axes and initial conditions on your graph. c) how long from when the stop watch was started at t = 0s did it take mia and jason to meet? express your answer in terms of know quantities v_0, a_m, and a_j. d) when the stop watch started at time t = 0s, how far apart, d, were mia and jason? express your answer in terms of know quantities v_0, a_m, and a_j.

If a stone with an original velocity of 0 is falling from a ledgeand takes 8 seconds to hoybthe ground whays the final velocity of the stone