Lúc 8h có 2 xe đạp chuyển động thẳng đều khởi hành cùng lúc từ 2 điểm A, B cách nhau 600m và đi ngược chiều nhau. Xe A đi với tốc độ 5 m/s. Xe B đi với tốc độ 4 m/s. a) Viết phương trình chuyển động 2 xe ( hệ quy chiếu tự chọn )
b) Xác định thời điểm và vị trí 2 xe gặp nhau
c) Xác định khoảng cách hai xe lúc 8h5'

Write a question about how changing temperature affects the gas inside the sports ball

Suppose water is leaking from a tank through a circular hole of area ah at its bottom. when water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cah 2gh , where c (0 < c < 1) is an empirical constant. a tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (assume the removed apex of the cone is of negligible height and volume.) (a) suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. the differential equation governing the height h in feet of water leaking from a tank after t seconds is dh dt = − 5 6h3/2 . if the height of the water is initially 8 feet, how long will it take the tank to empty? (round your answer to two decimal places.)

How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules? a. 0.25 n b. 4 n c. 6 n d. 16 n