Final answer:
To calculate the percent change in the kitten's weight from 1000 grams to 1200 grams, you determine the increase (200 grams), divide by the original weight (1000 grams), and then multiply by 100 to get a 20% increase. Uncertainty calculations involve multiplying the percent uncertainty by the given mass.
Step-by-step explanation:
The question asks how to calculate the percent change in the kitten's weight from one visit to the veterinarian's office to the next. To find the percent change, you subtract the initial value from the final value, then divide by the initial value, and finally multiply by 100 to get the percentage. In this case, the initial weight is 1000 grams and the final weight is 1200 grams.
So the calculation would be ((1200 - 1000) / 1000) × 100 which equals to (200 / 1000) × 100, or 20% increase in the kitten's weight.
If you encounter a situation where you're asked for the uncertainty of a mass measurement, like in the provided reference information, you would use the percent uncertainty given and apply it to the known mass. For a mass of 65 kg with a 3% uncertainty, the calculation would be 0.03 × 65 kg, which equals 1.95 kg.