Question

which of these quantities may be scientifically measured?
□ blood pressure
□ luminosity
□ enthusiasm
□ speed

Explanation:

• Blood pressure: Can be measured using devices like sphygmomanometers, with units like mmHg or kPa, so it's scientifically measurable.
• Luminosity: In physics, luminosity (brightness of celestial objects or light sources) can be measured using instruments, with units like watts or solar luminosities, so it's measurable.
• Enthusiasm: It is a subjective emotional state and there is no standard scientific instrument or unit to measure it quantitatively, so it cannot be scientifically measured.
• Speed: Can be measured as the distance traveled over time, with units like m/s, km/h, etc., using tools like speedometers or photogates, so it's measurable.

Answer:

• blood pressure
• luminosity
• speed