As shown below, a 450-kg roller-coaster car starts from rest at point A at a height of 47 m the track, reaching point B and then rolls up a second hill where it reaches a height of 23 m at point C). What are the gravitational potential energy and kinetic energy of the car when it is at points A, B, and C? What are the velocities at point B and C?

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.

Bahan yang digunakan mencegah terjadinya polarisasi pada batu baterai a.larutan h2so4b.mncl2 dan serbuk karbonc.pbso4d.nh4cl

Which component is used to measure the current in a circuit? oa. switch ob. resistor oc. ammeter the answer is c. for y’all plato people