# Ocr practical paper question on concept

• bonbon22
In summary, the conversation discusses the maximum number of disks needed to achieve less than 0.5% uncertainty for a specific question. The uncertainty is caused by the limited resolution of the scale and as more disks are added, the uncertainty decreases. The question asks if the number of discs for 0.5% uncertainty should be 9 or 10, with the answer being 10. The conversation also briefly mentions OCR (optical character recognition).
bonbon22
Homework Statement
problem statemetn below
Relevant Equations
volume = surface area of sphere * thickness
percentage uncertainty = absolute uncertainty/ value

should n't it be a maximum number to achieve less than 0.5% uncertainty for the last question as you add more disks would there not be more uncertanity therefore as the number of disks for 0.5% is 9.5, 10 would give an unceranity of greater than 0.5% so it should be 9? the answer is 10.

What's an ocr? Optical character recognition?

berkeman said:
What's an ocr? Optical character recognition?
Exam broad,, for a levels . IF you got free time friend would be grateful if you could help me out.

bonbon22 said:
should n't it be a maximum number to achieve less than 0.5% uncertainty for the last question as you add more disks would there not be more uncertanity therefore as the number of disks for 0.5% is 9.5, 10 would give an unceranity of greater than 0.5% so it should be 9? the answer is 10.
An implicit assumption going in is that the discs are identical.

The uncertainty is from the limited resolution of the scale: 0.2 grams. As specified, the scale's resolution is independent of how many discs you pile on. The more you pile on, the lower the uncertainty per disk.

berkeman and bonbon22

## 1. What is a practical paper question on concept?

A practical paper question on concept is a type of question that assesses a student's understanding of a scientific concept through hands-on experimentation or observation. It requires students to apply their knowledge and skills in a practical setting, rather than just answering theoretical questions.

## 2. How is a practical paper question on concept different from a traditional paper question?

A practical paper question on concept is different from a traditional paper question in that it requires students to perform experiments or observations to demonstrate their understanding of a concept, rather than just providing a written explanation or answer.

## 3. What types of experiments or activities are commonly included in practical paper questions on concept?

There are many different types of experiments or activities that could be included in a practical paper question on concept, depending on the specific concept being assessed. Some examples include designing and conducting experiments, analyzing data, creating models or simulations, and making observations in a real-world setting.

## 4. How should I prepare for a practical paper question on concept?

To prepare for a practical paper question on concept, it is important to review the relevant scientific concepts and principles, as well as any laboratory techniques or skills that may be needed. It can also be helpful to practice performing experiments or activities related to the concept, in order to become more comfortable with the process.

## 5. How are practical paper questions on concept graded?

Practical paper questions on concept are typically graded based on the accuracy and thoroughness of the student's experimental design, data analysis, and overall understanding of the concept being assessed. In addition, attention to detail, organization, and use of appropriate scientific terminology may also be considered in the grading process.

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