Calli:" lần đầu tiên " - ☺👍🏻💔 lần đầu tiên ngất vì học

Giải bài tập lực tương tác giữa 3 điện tích điểm ạ.

mọi người giúp em zới em cảm ơn trước ạ

Vẽ đồ thị hàm số y=|x-2| Giúp mik với nha

Đề:Một nguyên tử X có tổng số hạt là 46 , trong đó có 15 hạt mang điện tích dương . a.Tìm số hạt mỗi loại của nguyên tử X b.Dựa vào bảng các nguyên tố hóa học, hãy cho biết X là nguyên tử gì ?

Giúp mình bài 50 mình khoanh ạ. Mình cần gấp tối nay ạ. Thanks nhìu ạ

Ex3: Past simple, Past continuous, present perfect or past perfect 1. Amanda didn’t need to study the multiplication tables in 5th grade. She _________________ (learn) them. 2. I enjoyed visiting Tom’s class. It’s was arithmetic class. The students ____________________ (learn) their multiplication tables at that time. 3. While I ____________________ (walk) up the mountain, I got tired. But I didn’t stop until I reached the top. 4. I was very tired when I got to the top of the mountain. I ____________________ (walk) a long distance. 5. I knocked. No one answered. I turned the handle and pulled sharply on the door, but I did not open. Someone ____________________ (lock) it. 6. A: “Where were you when the earthquake occurred?” B: “In my office. I __________________ (talk) to my assistant. We _____________ (work) on a report. 7. A: “Ahmed’s house was destroyed in the earthquake.” B: “ I know! It’s lucky that he and his family ____________________ (leave) for his parents’ home before the earthquake ____________________ (struck). 8. We drove two hundred miles to see the circus in Kansas City. When we got there, we couldn’t find the circus. It ____________________ (leave) the town. We ____________________ (drive) all the way to Kansas City for nothing. 9. I started to tell Rodley the news, it was nothing, but he stopped me. He________________(hear/already) it. 10. When Rita went to bed, it was snowing. It ____________________ (snow/ still) when she woke up in the morning. 11. You’re from Jakarta? I ____________________ (be/never) there. I’d like to go there someday. 12. Gina called me on the phone to tell me the good news. She ____________________ (pass) her final exam in English. 13. Otto’s back to work today but was in hospital last week. He ____________________ (be/never) a patient in a hospital before. It was a new experience for him. 14. Are you still waiting for David? ____________________ (he/come/not) yet? He’s really late, isn’t he? 15. A couple of weeks ago, Mr. Fox, our manager, surprised all of us. When he walked into the office, he ____________________ (wear) a T-shirt and jeans. Everyone stopped and stared. Mr Fox is a conservative dresser. Before that time, he ____________________ ( wear, never) anything but a blue or grey suit. And he ____________________ (wear/ not) his jeans to the office since that time. He wore them only that one time. 16. The phone rang, so I ____________________ (pick) it up and ____________________ (say) hello. 17. I heard a slight noise , so I ____________________(walk) to the front door to investigate. I ____________________ (look) down at the floor and ____________________(see) a piece of paper. Someone ____________________ (push) a note under the door to my apartment.

Cường độ dòng điện: I Hiệu điện thế: U Điện trở:R

Giúp em với ạ,1 trong 2 cx được mà cả 2 thì càng tốt ạ

VD 2: Một con lắc lò xo có khối lượng không đáng kể, độ cứng là k, lò xo treo thẳng đứng, bên dưới treo vật nặng có khối lượng m. Ta thấy ở vị trí cân bằng lò xo giãn ra một đoạn 16cm. Kích thích cho vật dao động điều hòa. Xác định tần số của con lắc lò xo. Cho g=π2 (m/s2 )