Question

1. based on the image, what can you infer about the mass of the object being measured?

riders unit: grams
x 1.5
○ the mass is exactly 255.00 grams.
○ the mass is slightly less than 255 grams.
○ the mass is slightly more than 255 grams.
○ the mass is not exactly 255 grams, but it is impossible to tell whether the mass is greater than or less than 255 grams.

1. you place a mass of 250 grams on the measurement tray of a triple beam balance and then set the rider on the 500 gram beam to the 200 gram mark (the other riders are set to 0 grams). which of the following statements is true?

○ the pointer will be above the zero mark.
○ the pointer will be below the zero mark.
○ the pointer will be lined up with the zero mark.
○ the pointer will move up and down once per second.

Explanation:

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Question 4

Step1: Calculate total rider mass

$50\ \text{g} + 200\ \text{g} + 5\ \text{g} = 255\ \text{g}$

Step2: Analyze pointer position

The pointer sits to the right of the zero mark, meaning the total rider mass is slightly heavier than the object's mass.

Step1: Compare tray and rider mass

Tray mass: $250\ \text{g}$, Rider mass: $200\ \text{g}$. The tray mass is greater.

Step2: Determine pointer position

When the tray mass exceeds rider mass, the pointer dips below the zero mark.

Answer:

The mass is slightly less than 255 grams.

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Question 5