giup voi-

luc nao sau day la luc dan hoi

1...luc day cua cung tac dung vao mui ten

2....luc keo soi day cao su dan dai ra

chon giup minh voi

trong nhung cau tho duoi day nhung tu nao la dai tu nhung tu nao khong phai la dai tu vi sao

1) Trong quang hop, phan tu nao sau day khong phai la san pham cua pha sang

A. Duong       B. Oxi         C. ATP               D. NADPH

Phai mac cac rong roc dong va rong roc co dinh nhu the nao de voi 1 so it nhat cac rong roc , co the dua 1 vat co trong luong P = 1600N len cao ma chi can 1 luc keo F = 100N . Coi trong luong cua cac rong roc la khong dang ke .

1) Cau tao nao sau day cua luc lap chua phan tu clorophyl

A. Mang cua tilacoit   

B. Chat nen cua luc lap

C. Mang ngoai cua luc lap      

D. Mang trong cua luc lap

Trong cac cau sau day , cau nao dung , cau nao sai ?

a) Neu a la so nguyen thi a cung la so thuc .

b) Chi co so 0 khong la so huu ti duong va cung khong la so huu ti am .

c) Neu a la so tu nhien thi a khong phai la so vo ti .

co hai doi keo co hay cho biet:

- luc ma hai doi tac dung len soi day la luc keo hay luc day?

- luc do doi ben trai tac dung len day co phuong va chieu nhu the nao?

- neu soi day dung yen thi luc tac dung cua hai doi len soi day co dac diem gi?

mot cai be khong co nuoc , neu mo cung luc 2 voi thi sau 6 giobe se day, neu chi mo voi 1thi phai 9 gio be moi day.vay neu chi mo voi hai thi phai sau may gio thi day be? [cac ban nho ghi loi giai nhe]