Experimental Programme

What is the fractional uncertainty of a measurement of $200 \pm 4 \text{ cm}$?

In a graph of $y$ against $x$, what is represented by the 'line of best fit'?

Which of the following identifies the base unit of mass in the SI system?

What is the most reasonable estimate for the weight of a typical apple?

In a graph of $y$ against $x$, error bars represent the uncertainty in the measurements. The line of best fit must:

The momentum $p$ of an object is $p = mv$. If $m = 2.0 \pm 0.1 \text{ kg}$ and $v = 10.0 \pm 0.2 \text{ m s}^{-1}$, what is the absolute uncertainty in $p$?

A digital scale reads $5.00 \text{ g}$ when no mass is placed on it. This is an example of:

A researcher wants to determine the value of a constant $c$ in the equation $y = c/x^2$. They have a set of $(x, y)$ data with uncertainties. To find $c$ from the gradient of a straight-line graph, they should plot:

A micrometer screw gauge has a zero error of $-0.02\text{ mm}$. When measuring a wire, the reading is $0.48\text{ mm}$. What is the corrected reading?

A student measures the density of a cube. The mass is measured with $1\%$ uncertainty and the length of one side with $1\%$ uncertainty. What is the uncertainty in the density?

What is the SI unit for electric potential difference?

A student measures the length of a string as $25.0\text{ cm}$. What is this length in meters using scientific notation?

The density $\rho$ of a cube is calculated using $\rho = m / V$. If the percentage uncertainty in $m$ is $1\%$ and in the side length $L$ (where $V=L^3$) is $2\%$, what is the percentage uncertainty in density?

Which of the following is equivalent to $1\text{ millijoule}$?

Which of the following will result in a change in the gradient of a straight-line graph?

The period of a pendulum is $T = 2\pi \sqrt{L/g}$. If the absolute uncertainty in $L$ is $\Delta L$ and the absolute uncertainty in $g$ is $\Delta g$, what is the fractional uncertainty in $T$?

A student finds that a graph of $1/v$ against $1/u$ for a thin lens is a straight line. The equation is $\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$. If $1/v$ is on the y-axis, what is the gradient of the graph?

A student uses the formula $v^2 = u^2 + 2as$ to find $a$. If $u = 0$, $v = 10.0 \pm 0.2\text{ m/s}$, and $s = 5.0 \pm 0.1\text{ m}$, what is the percentage uncertainty in $a$?

In a resonance tube experiment, the sound level is measured with a sensor. The background noise adds a constant $10\text{ dB}$ to every reading. This is an example of:

A mass $M$ is hung from a wire of length $L$ and diameter $d$, causing an extension $e$. Young's modulus is $E = \frac{4MgL}{\pi d^2 e}$. If the uncertainty in $d$ is $2\%$ and the uncertainty in $e$ is $5\%$, and all other quantities are known to $1\%$, which quantity contributes most to the uncertainty in $E$?

What does a gradient of zero on a displacement-time graph indicate?

When using a data logger with a sensor, which of the following is usually improved compared to manual measurement?

What is the correct way to calculate the absolute uncertainty from a set of repeat readings?

Which of the following belongs in the 'Conclusion' section of the report?

For a simple pendulum, $T = 2\pi \sqrt{L/g}$. To determine $g$ from a graph of $T^2$ against $L$, the student finds the gradient $M$. Which expression gives the value of $g$?

Which of the following should be included in the 'Safety, Environmental, and Ethical Considerations' section of an IA?

A graph of force $F$ vs acceleration $a$ for a constant mass $m$ produces a straight line. What does the y-intercept represent if there is a constant frictional force $f$ acting on the object ($F_{total} = ma + f$)?

When evaluating the 'reliability' of data in an IA, which of the following is most important?

A student measures the distance $s$ an object falls from rest in time $t$. The student plots $s$ vs $t^2$. If the gradient is $4.8 \text{ m/s}^2$, what is the experimental value for $g$?

In the context of an IA, what is the 'internal' aspect of the Internal Assessment 'Scientific Investigation'?