có 1 hỗn hợp vàng, kẽm, bạc. Hãy nêu cách tác 3 kim loại đó ra, cho biết:nhiệt độ nóng chảy của 3 chất vàng, kẽm, bạc lần lượt là 1064 độ C,420 độ C,960 độ C.

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

Distinguish between linear momentum and angular momentum

Answer asap 50 points which of the following illustrates how a venus fly trap senses that an insect has landed in its open leaves? 1. using tiny hairs, the leaves sense a change in light. 2. using tiny hairs, the leaves taste a chemical. 3. using tiny hairs, the leaves detect a touch. 4. using tiny hairs, the leaves sense a change in water levels.