Physics 7408 試験対策

電卓プログラム

よくあるミス

1. 1high影響する配点: 2Limitation of physical measurements

   Selecting small coordinate gradient triangles (less than 50% of the grid size) for graphical analysis in Paper 3.

   回避方法: Always construct your gradient calculation triangle to cover more than 50% of the line of best fit on both axes.
2. 2medium影響する配点: 1Radioactivity

   Omitting the '+' sign between products in nuclear decay and reaction equations (e.g., separating the daughter nucleus and the alpha particle).

   回避方法: Clearly write nuclear equations using standard notation, ensuring products are explicitly separated with a '+' sign.
3. 3high影響する配点: 2Force, energy and momentum

   Directly multiplying force by parallel distance in moments calculations instead of identifying and resolving the perpendicular distance.

   回避方法: Identify the hinge/pivot point, trace the line of action of the force, and resolve the perpendicular component of distance or force.
4. 4medium影響する配点: 2Force, energy and momentum

   Forgetting to include the weight of a uniform rigid beam acting at its midpoint in equilibrium moments equations.

   回避方法: Always draw a free-body diagram representing the beam's weight acting downwards at the exact geometric center before taking moments.
5. 5high影響する配点: 2Thermal physics

   Using temperatures in Celsius instead of Kelvin in gas laws or thermal equations.

   回避方法: Convert Celsius temperatures to Kelvin immediately by adding 273.15 before performing any calculations.
6. 6medium影響する配点: 1Limitation of physical measurements

   Plotting graphs with feathered, sketchy, or double lines.

   回避方法: Use a sharp pencil and draw a single, clean, continuous line of best fit directly through the plotted data.
7. 7high影響する配点: 2Limitation of physical measurements

   Failing to convert metric prefixes (e.g., mm, mV, microseconds) to standard SI units when evaluating experimental intercepts or gradients.

   回避方法: Read the axis scale labels carefully and convert standard prefixes (e.g., milli = 10^-3) before evaluating calculation constants.
8. 8high影響する配点: 1Limitation of physical measurements

   Rounding intermediate calculation values too early, which pushes the final answer outside of the acceptable range.

   回避方法: Keep unrounded values stored in the calculator's memory and perform rounding only on your final output step.
9. 9medium影響する配点: 2Progressive and stationary waves

   Attempting to use the wave equation (v = f * lambda) to determine the speed of sound in a rod instead of calculating the pulse travel time and distance.

   回避方法: Differentiate between propagating wave pulse speed (v = d/t) and continuous standing wave calculations before selecting your formulas.
10. 10medium影響する配点: 2Limitation of physical measurements

    Confusing percentage uncertainty with absolute uncertainty when calculating or drawing error bars.

    回避方法: Absolute uncertainty is represented by physical dimensions on graph grids, whereas percentage uncertainty is absolute uncertainty divided by the value, multiplied by 100.