I. D. short

II. False

How about you?

It's on 2/4 street

Bai 1:

Tom tat

V = 3000 cm³= 0,003m³

D = 2700 kg/m³

a. m=?

b.P= ?

c. d=?

a.Khoi luong cua vat bang nhom la: m= V.D= 0,003.2700= 8,1(kg)

b.Trong luong cua vat bang nhom la: P=m.10= 8,1.10=81 (N)

c. Trong luong rieng cua vat bang nhom la:

d=10.D= 2700.10= 27000 (N/m³)

Dung tay ep hai dau lo xo but bi lai. Luc ma lo xo tac dung vao tay ta la luc dan hoi

|x|=a => x=a hoac x= -a (minh giai theo cach voi dieu kien a ϵ N*)