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.

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

The amount of potential energy possessed by an elevated object is equal to what?

Compare the patterns of the two waves shown in the image. which statement is true about these waves?