Final answer:
The mass of 10 pennies, each weighing 2.5 grams, is calculated using dimensional analysis to be 25 grams.
Step-by-step explanation:
To calculate the mass of 10 pennies, we can set up our equation using dimensional analysis. We know that one penny has a mass of 2.5 grams, so for 10 pennies it would be:
- Multiply the mass of one penny by the number of pennies: 2.5g/penny × 10 pennies.
- Since the unit of pennies cancels out, we're left with the unit of grams, which is appropriate for the size and weight of the coins.
- Calculate the total mass: 2.5g × 10 = 25g.
The mass of 10 pennies is 25 grams.