At 17°c, a rod is exactly 20.09 cm long on a steel ruler. both the rod and the ruler are placed in an oven at 306°c, where the rod now measures 20.18 cm on the same ruler. what is the coefficient of linear expansion for the material of which the rod is made? (in degrees c^-1)

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.

Iwould say the answer is d