Which of these ideas was part of the earliest model of the atom?
a) atoms can produce streams of charged particles
b) electrons move too fast to describe where they are located
c) neutrons are located in the same place as protons
d) atoms are hard, tiny particles like billiard balls

If a simple machine reduces the strength of a force, what must be increased?

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?

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?