Let us solve Irodov problem 1.1 on Kinematics. The problem states: A motorboat going downstream overcame a raft at a point A; τ=60 min later it turned back and after sometime passed the raft...
Organic chemistry is the study of compounds that contain carbon. It is one of the major branches of chemistry. In 1815, a Swedish chemist J.J. Berzelius put forward vital force theory to explain the origin...
Newton’s first law of motion states that a body continues to be in a state of rest or of uniform motion in a straight line unless it is acted upon by a net external force. Newton’s second...
Solution 1: Apply cos c = (17^2 + 4^2 - 15^2)/2*17*4 = 10/17 in ADC. In ABC, cos C = ( 17^2 + (4+x)^2 - 17^2) / 2*17*(4+x) Find x. Find the angle cos C, then take BD as x. Then cos C will be same for...