(Question)
Q: When waves of two different frequencies interfere, what phenomenon occurs? Read this paragraph and choose the correct option from the provided answers: When waves of two different frequencies interfere, a phenomenon known as beating occurs. The frequency of a beat is the difference of the two frequencies. Choices: - making - opening - soaking - beating A:
(Answer)
beating

(Question)
Q: What is the force that pulls particles at the exposed surface of a liquid toward other liquid particles called? Read this paragraph and choose the correct option from the provided answers: Two unique properties of liquids are surface tension and viscosity. Surface tension is a force that pulls particles at the exposed surface of a liquid toward other liquid particles. Surface tension explains why water forms droplets, like the water droplet that has formed on the leaky faucet pictured in the Figure below . You can learn more about surface tension at this URL: http://io9. com/5668221/an-experiment-with-soap-water-pepper-and-surface-tension . Choices: - conservative tension - shinking tension - transfer tension - surface tension A:
(Answer)
surface tension

(Question)
Q: A reference point is used in measurement to make what? Read this paragraph and choose the correct option from the provided answers: Estimation, as used in measurement, is the process of referencing a physical quantity in terms of a calibration or reference point. All measurement devices have reference marks of some kind. Choices: - deviation - focal point - regression - estimation A:
(Answer)
estimation