Elements heavier than hydrogen are formed when light elements undergo nuclear fusion. fusion takes place within stars at temperatures nearing 108k. explain why this high energy is required for fusion to occur. a) high temperatures result in high kinetic energy that is converted to the nuclear binding energy. b) high temperatures result in the high kinetic energy needed to overcome the repulsive force of the two nuclei. c) high temperatures result in high kinetic energy that in turn creates a strong electrostatic force between the two nuclei. d) high temperatures result in the high kinetic energy needed to produce the strong force required to hold the nuclei together.

B is the best answer.  Once the particles are sufficiently close, the strong nuclear force becomes stronger than the Coulomb repulsion and they are pulled together.  This results in bound particles that have a binding energy that can be retrieved of you can get the particles far enough away from one another after binding, but this requires large and unstable nuclei (beyond lead on the table)  These elements are referred to as radioactive, because they are prone to decaying

Since you have not included the experiment situation and the data, of course, i can not give you specific details about it. but i can you with this question.1) i will assume that the motion is projectile (parabolic) motion.2) yes, the horizontal distance depends on the horizontal velocity as, naming vx the horizontal velocity and t the time, it is: x = vx × t3) now, observe that the flight time depends on the vertical velocity as, naming voy the initial vertical velocity, t the time and y the vertical distance before reaching the ground: y = yo + voy×t - gt² / 2.the higher the initial vertical velocity (voy) the longer the object will be flying and so t will be higher in the equation for the horizontal distance.that explains the relationship between the horizontal distance and the horizontal velocity.