The angle between the rod and the string at B is 50°. The rod has length 1.2m and weight 8.5 N. An object O of mass M is hung from the rod at B. The tension T in the
string is 30N
(i) Use the resolution of forces to calculate the vertical component of T.

In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?

Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?