Mặt phẳng (P) đặt trong không khí, tích điện đều với mật độ điện mặt  = – 3,54.10 – 9 C/m2.
Chọn gốc điện thế tại mặt phẳng (P); tính điện thế tại điểm M cách (P) một đoạn x = 40 cm.

A1kg cart slams into a stationary 1kg cart at 2 m/s. the carts stick together and move forward at a speed of 1 m/sl. determine whether kinetic energy was conserved in the collision. use the law of conservation of energy to explain the collision

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?