Introduction to Science and Tecnology
What factors determine the effectiveness of artifacts, both modern and old?
Their intended use, the context in which they are used, and the technology available when they were made.
What is the function of the pH meters?
It measures their degree of alkalinity and acidity
What do both mercury and infrared thermometers use as common units to measure temperature?
Both thermometers measure temperature in degrees Celsius (°C) and Fahrenheit (°F).
What is the main purpose of both old and new scales?
To measure weight.
Why might handcrafted instruments be preferred in some professional jobs?
Handcrafted instruments may be preferred in certain jobs that require a personal touch or a simpler, more customized approach, where the precision and uniqueness of each piece are important.
What changes in a reactive strip when in contact with alkalinity and acidity?
It changes shade and color when in touch with alkalinity and acidity
How does the speed of the infrared thermometer compare to the mercury thermometer?
Infrared thermometers are much faster, while mercury thermometers.
What do digital scales need to work that older scales do not?
Batteries or electricity.
In what ways have scientific and technological advances benefited modern artifacts?
More accurate, efficient, and capable of performing complex tasks. New materials and production methods also allow for more durable, and adaptable products.
What is the alternativity of the pair of electrodes in the portable pH meter?
The alternativity is a combination of electrode.
How does the infrared thermometer measure temperature?
It detects infrared radiation emitted by an object.
How do balance scales measure weight?
By comparing the weight of an object to known weights on a beam.
Why might it be challenging to compare the effectiveness of new and old artifacts?
Because newer artifacts often include advanced technologies, while older artifacts may still be useful in specific tasks.
How are both the pocket ph meter and pH paper made?
The pH paper is obtained from dipping it into chemical solutions.
The portable pH meter consists of a simple electronic amplifier, a pair of electrodes, and some type of display calibrated in pH units
What are the main factors that can affect the accuracy of an infrared thermometer?
Factors like distance from the object and environmental conditions.
What are some extra features digital scales can have?
Switching between units, remembering previous weights, and subtracting container weight (tare function).
How do technological advancements impact the performance of modern artifacts compared to older ones?
Modern artifacts, allow them to handle more complex tasks with greater precision. Older artifacts may not be as efficient for these jobs.
What does the inside of the electrodes contain?
They have rod structures, usually made of glass, with a bulb containing the sensor at the bottom, also they have an electronic amplifier inside them.
How does the accuracy of the infrared thermometer compare to the mercury thermometer?
Mercury thermometers are more accurate, while infrared thermometers can be less precise due to external factors.
Why might older scales become less accurate over time?
Due to wear and environmental factors like moisture or temperature changes.