Giúp mik giải bài toán này nhé mọi người!!!!!!!!!

Cho mạch điện như hình vẽ,L=1H, suất điện động =12V,r= 0,điện trở của biến trở là R=10ôm .Điều chỉnh biến trở để trong 0,1s điện trở của biến trở giảm còn 52. a. Tính suất điện động tự cảm xuất hiện trong ống dây trong khoảng thời gian nói trên b. Tính cường độ dòng điện trong mạch trong khoảng thời gian nói trên Giúp em với ạ em đang gấp lắm

giải cho em câu này với !!!, please!!!!!! help mee

giúp mình với! Mình cảm ơn nhiều ạ

-12(x-5)+7(3-x)=5 Có ai biết ko ạ Biết thì cứu em với

Tìm phân số biết: Tử số nhỏ hơn mẫu số là 3 đơn vị; nếu thêm cả tử số và mẫu số 1 đơn vị thì ta được phân số mới là 3/4

Cửa hàng bán 1 máy tính với giá 8.750.000 đồng . Tiền vốn để mua máy tính đó là 7.000.000 đồng . Hỏi khi bán máy đó , cửa hàng lãi bao nhiêu % ?

(2x^2+1)(4x-3)=(2x^2+1)(x-12) giải phương trình

giúp mk bài 2,3,4,5 nha mk đang cần gấp mk sẽ voie 5 sao

V. Choose the most suitable words given in the box to complete the passage. Use the word once only. There are 3 words that are notused. 1 Beautiful Cunning Envy 3 Guarding 2 Jealous Open 4 Riding 5 Rescue Once upon a time, in the kingdom of Love, there liveda (1) princess. A wicked witch was (2) of her beauty. She kidnapped the princess and locked her in a dungeon with a dragon(3) atthegate.Oneday,ahandsomeprincepassedby,(4) on his white horse. The princess shouted for help. “ Don’t worry,I will(5) you!” said the prince. He killed the dragon and fought with the witch. The princess wassaved. VI. Read the following story and choose the best answer for eachquestion. Once upon a time, there lived in Morocco one of the richest men on earth. He was King Jodas. He loved gold more than anything else in the world except his lovely, young daughter with silky, black hair and sparkling eyes. Whenever King Jodas walked among his fruit trees and flower bushes, he wished he could turn them all intogold. Early one morning, a god called Terrus came to visit King Jodas in his palace. He came to reward King Jodas for doing him a favour. Terrus offered to grant King Jodas whatever he wanted on earth. The King immediately asked that everything he touched be turned into gold. Terrus unwillingly granted King Jodas his wish and vanished. Everything was fine till one fateful day. The King wept aloud in despair as he hugged a golden figurine he loved so much. He did not mean to turn her into gold. He begged Terrus to take away the curse of the goldentouch. 1. Which of the following was King Jodas;s mostfavoured? A.gold B.fruittrees C.flowerbushes D. his daughter 2. King Jodas’ love for gold tells thathewas . A.greedy B.selfish C.rich D. cruel 3. Terrus was in Morrocobecausehe . A. wanted to visit KingJodas B. wanted to return King Jodas afavour. C. decided to marry King Jodas’daughter D. heard about King Jodas’wish 4. King Jodascriedbecause . A. Terrus was not going to grant him hiswish B. Terrusvanished C. his daughter was turned into gold D. Terrus took away hiswish 5. Which of the following titles is the most suitable for thestory? A. The golden king B. The king and hisdaughter C. Areward D. The golden touch