Aparticle of charge is released from rest at the point cm on an x axis. the particle begins to move due to the presence of a charge q that remains fixed at the origin. what is the kinetic energy of the particle at the instant it has moved 43 cm if (a) q = +20 μc and (b) q = -20 μc?

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers

For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap