Đặt lần lượt các điện tích q1= 1 nC, q2= -1Nc, q3= 1nC , q4= 1 nC vào các đỉnh A, B, C, D của hình chữ nhật, kích thước 10cmx20cm trong không
khí. Tính điện thế tại O là giao điểm của hai đường chéo hình chữ nhật, chọn gốc
điện thế tại vô cùng.

Which is not true about oxygen-17 and oxygen-18?

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue

Abeam of electrons moves at right angles to a magnetic field of 4.5 × 10-2 tesla. if the electrons have a velocity of 6.5 × 106 meters/second, what is the force acting on the electrons? the value of q = -1.6 × 10-19 coulombs.