Calculate the electric potential 0.250m from an electron
what is the electric potential difference between two points that are 0.250cm and 0.750 cm from an electron?
how would the answers change if the electron were replaced by a proton

What if? if the temperature near the cliff suddenly falls to 0°c, reducing the speed of sound to 331 m/s, what would the initial speed of the rock have to be (in m/s) for the soccer player to hear the sound of the splash 2.90 s after kicking the rock?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles