đặt lần lượt các điện tích q1=1nC, q2=-1nC, q3=1nC, q4=1nC vào các đỉnh A, B, C ,D của hình chữ nhật, kích thước 20cm x 40cm trong không khí. Tính điện thế tại O là giao điểm của 2 đường chéo hình chữ nhật, chọn góc điện thế tại vô cùng.

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

Write a hypothesis about the effect of increasing resistance on the current in the circuit. use theformat and be sure to answer the lesson question. “how do changes in voltage or resistance affect current in an electric circuit? ”