Khi vat noi va nam can bang tren mat chat long thi luc day Ascimet co cuong do bang :

A. Trong luong phan vat chim trong chat long

B.Trong luong phan chat long co the tich bang the tich vat

C. Trong luong phan chat long bi vat chiem cho

D. Trong luong phan vat noi tren mat chat long

day la hoc ki may vay bannn

ban tu ve hinh nha !

Xet 2 tam giac vuong ABC va tam giac ADC, co:

AB=AD (gt)

AC la canh chung

Suy ra Tam giac ABC=Tam giac ADC (c.g.c)

O day mik ko noi den goc la vi 2 tam giac nay da vuong goc r nen vi vay ta chi can dua ra 2 li do la dc nha ban hien !

doi mik chut xiu nha

* tan so :Dao dong cang nhanh (cham) thi tan so dao dong cang lon (nho),am phat ra cang bong (tram)

* bien do dao dong : Am phat ra cang to (nho) khi bien do dao dong cang lon (nho).

Hi ban hien