hi. i need answer on the questions below. please provide explanation or solutions if needed so i can better understand it. thank you!

29. What is the magnitude of the force vector you apply on a 10-kg dumbbell by lifting it at height of 1 meter and holding it still for 1 minute? A. 46 N B. 65 N C. 98 N D. 124 N E. No Answer 30. Things feel lighter when submerged in a pool of water. Why is that so? A. There is a vector acting upward on the object, applied by the pool of water. B. The water applies sideways forces that holds the object. C. There is a vector acting downward on the object, applied by the pool of water. Water is less dense, making objects float on it. D. No Answer 31. You are fixing a furniture that requires some screws to join the parts. You noticed that the screw is "right-handed". If you want to join two parts using this screw, how will you rotate the screw when viewed from the nail's head? A. Clockwise B. Counterclockwise C. No Answer 32. What does A.A, the scalar product of a vector with itself give? What about AxA, the vector product of a vector with itself? A. 1, 0 B. 0, 1 C. 1, 1 D. 0 , 0 E. No Answer 33. Which of the following is not a legitimate mathematical operation: A. A.(B-C) B. (A-B) x C C. A.(BXC) D. Ax(B.C) E. No answer 34. If F= q(VxB) and V is perpendicular to B, then what is the direction of B in the three situations shown in the figure? The charge q is negative. X A. +z B. - Z C. +y D. - X E. No