In an x-ray tube, electrons are accelerated in a uniform electric field and then strike a metal target. suppose an electron starting from rest is accelerated in a uniform electric field directed horizontally and having a magnitude of 2800 n/c . the electric field covers a region of space 12.5 cm wide. what is the speed of the electron when it strikes the target?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?