.Bơm hút lưu lượng Q=6 lít/s từ bể chứa nước ở nhiệt độ t=20oC (hệ số nhớt động học ν=0,01St). Chân không kế cửa vào bơm (điểm V) chỉ pck= 6,87 N/cm2 ; ống hút có đường kính d= 100mm, dài l=10m ; hệ số cản cục bộ lưới lọc ζL=7 ; hệ số cản cục bộ đoạn uốn cong (góc uốn 90o, bán kính uốn 150mm) ζU=0,16 ; ống tráng kẽm thông thường (độ nhám tuyệt đối thành ống  = 0,29mm) ; vận tốc trên mặt bể không đáng kể. Tính chiều cao đặt bơm Hs (khoảng cách từ bơm đến bể hút)

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

A12 mm diameter shaft runs in a plain cylindrical bush 30 mm long that is located in an 18 mm diameter hole in a housing. the shaft-inner bush fit is h8 f and the outer bush-housing fit is h7-p6. make a fully cimensioned sketch of the bush with tolerances. find the maximum and minimum clearance or interference for both fits on the inner and outer diameters of the bush

Acylindrical tank is capable of storing 20,000 foot-pounds [ft ibf] of energy for use in your roommate's 2006 subaru wrx. the tank contains nitrous oxide, n20, which you may assume is an ideal gas and has a molecular weight of 44 grams per mole 1g/mol. the tank fits in a space in the trunk that is no wider than 6 inches fin] and no longer than 10 inches [inj, and you may assume the warm clemson weather is keeping the temperature of the tank inside the trunk at a constant 100 degrees fahrenheit [°fl. what is the weight of the nitrous oxide occupying the tank when full, in units of dynes