41. The attractive force is not overcome by the repulsive force, but by the thermal energy of the molecules. 42. B, each body is subject to an attractive force , where } } is the " universal gravitational constant ". 43. :To a first approximation, there is no attractive forces between gas molecules, see Kinetic Molecular Theory and Ideal gas. 44. A stronger attractive force was postulated to explain how the atomic nucleus was bound despite the protons'mutual electromagnetic repulsion. 45. The AC electric field gives rise to attractive forces between water droplets and increases the probability of coalescence at contact. 46. As the sampling begins, the tip is moved close to the sample which creates a weakly attractive force between them. 47. While compass surveying, the magnetic needle is sometimes disturbed from its normal position under the influence of external attractive forces . 48. This force is due to the ability of the water to contact the tip, thus creating an undesirable attractive force . 49. Is it possible that I can detect a small attractive force between two staffs when I spin them close and parallel? 50. In paramagnetic and ferromagnetic substances the weak diamagnetic force is overcome by the attractive force of magnetic dipoles in the material. 