Để tài : Xây dựng chương trình quan trắc cho làng nghề tái chế bình ắc quy cũ tại Xã Chỉ Đạo, Huyện Văn Lâm, Tỉnh Hưng Yên - Xác định phương án quan trắc
- Quy chuẩn tiêu chuẩn sử dụng để đánh giá
- Xác định thông số môi trường cần quan trắc
- Xác định vị trí , tần suất và thời điểm lấy mẫu
mn giúp em tìm 4 ý này vs ạ

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.