The nucleus of a 125xe atom (an isotope of the element xenon with mass 125 u) is 6.0 fm in diameter. it has 54 protons and charge q=+54e(1 fm = 1 femtometer = 1×10−15m.) hint: treat the spherical nucleus as a point charge.

a) what is the electric force on a proton 9.0 fm from the surface of the nucleus?

express your answer in newtons.

b) what is the proton's acceleration?

express your answer in meters per second squared.

2) two 3.5-cm-diameter disks face each other, 2.0 mm apart. they are charged to ± 11 nc .

a) what is the electric field strength between the disks?

express your answer in newtons per coulomb.

b) 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?

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.

Which describes increasing the efficiency of energy resource