Passage 2
1. A
This question asks which trial had the longest radio waves, or wavelength. By simply looking at the values under the v-like symbol, the largest value is 25, meaning “Trial 3” must be the answer.
2. B
This question examines different aspects of the tables. It asks to identify the relationship between frequency and wavelength. By looking at the table, it can be seen that when wavelength is positive, frequency is negative, and vice versa. Therefore, the relationship between them must be an inverse one.
3. D
This question asks which aspect of the experiment is the ‘independent variable’. This means that when this variable changes, all the other ones must change as well. By looking at the table, it can be seen that as the speeds change, the frequency and the wavelength change as well, meaning speed is the independent variable.
4. A
The airplane flies towards the receiver, meaning Experiment 2 is being used. By noting that 3 Hz is in between 2.75 and 4.00 Hz, but not exactly in the middle, 410 M/S is the most plausible answer.
5. C
By remembering that wavelength and frequency are inversely proportional, the answer must show that relationship. Since “C” states the receiver captures positive frequencies for incoming planes, while it also captures positive wavelengths for departing planes, it must be the answer since the two are clearly inverse.
6. C
In this type of experiment, advanced equipment must be used to measure the frequency and wavelength. Since this cannot be measured exactly regardless of the quality of the equipment, any error in the experiment must be the slight error of the equipment.