Cho mạch điện gồm 1 nguồn điện, 2 bóng đèn Đ1, Đ2 mắc lối tiếp, 1 ampe kế đo cường độ dòng điện chạy trong mạch, 1 công tắt (khóa( K) )đóng, dây dẫn. Vẽ sơ đồ mạch điện và chiều dòng điện.

d.7.5cm is your answer

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.