một mẫu thử có đường kính d=20mm chiều dài thử l0=200mm chịu một lực kéo p=45mn độ dãn dài đàn hồi đo được l=200,017mm hãy tính modun đàn hồi khi kéo E

Orange juice has a lower or higher viscosity than chocolate syrup

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.