You are walking toward the back of a bus that is moving forward with a constant velocity. describe your motion relative to the bus and a point on the ground.

to the bus you walk at one pace

to the ground you add the bus to your speed

try it on a bus or train ... windows help

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

heat the gas and measure the pressure