1Ⅰ4.卷如1图4-所2示1(,每一题物6块分位)于光滑水平桌面上,用一大小为F、方向如图所示的力去推它,使它以加速度a向右运动。若保持力的方向不变而增大力的大小,则A.a变大B.a不变C.a变小D.因为物块的质量未知,故不能确定a变化的趋1势5.氢原子的能级图如图所示。欲使一处于基态的 1I4. Volume as shown in Fig. 1 - Fig. 4 - Fig. 1 (6 blocks for each question) on a smooth horizontal table, push it with a force of size F, as shown in the figure, to accelerate it a moves to the right. If the direction of force remains unchanged and the force is increased, then Aa becomes larger and Ba does not decrease. D. Because the mass of the block is unknown, it is impossible to determine the tendency of a to change. 5. Energy level diagram of hydrogen atom Picture shows. To make a ground state