PR Edutech

 1)  The coordinates of the centre of the circle, O, and   a point on the circle, N, are shown in the figure below.  What is the radius of the circle?  (a)√0.4 units (b) 2 units (c) 4 units (d) √42.4 units Ans: (b) 2 units For Video explanation Click : https://youtu.be/kdX8vne7mQU 2) Harsha made a wind chime using a frame and metal rods. She punched 8 holes in the frame, each 2 cm apart, and then hung 6 metal rods from the frame, as shown in the figure below.  The ends of the metal rods are aligned over a line, shown by the  dotted line in the figure. If all of the rods are straight and not  swaying, then what is the length of Rod P ? (a) 69/7cm  (b) 53/5cm  (c) 76/5cm  (d) 111/7 cm Ans :(d) 111/7  cm For Video explanation Click : https://youtu.be/VUwJU29_B0s 3)In the figure below, PQRS is a square. What is the value of sin ∠SPT? (a) 8/17             (b) 8/15   (c) 15/17  ...

 

Dear students, Here is the theory for topic Well of death.          For Video explanation, Click on the following link            Well (Wall )of death

 

 Dear Students , here is practice paper for Ch.2 Mechanical properties of fluid.