Cho hai điện tích điểm Q1 = 1nC, Q2 = -2nC đặt tại A và C trong không khí như hình vẽ AC = CB = CD = 20cm. Điện thế tại D là

Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?

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

Smallest intensity of a stimulus that you can detect 50 percent of the time is