Section 4: Answer the following questions in your notebook. You need to know that: 1) a stack of 30 pennies is 4.15 cm tall and 2) a light year is a measurement of distance.
If you want to do this successfully, make sure to assign units to EVERYTHING before multiplying or dividing. Track your units throughout!
1. What is the average height of a penny? Using the average height determine the height
of a stack of 6.022x1023 pennies in km.
2. How many light years is this? (Light travels 3.00x108
km per second)
3. How many round trips is this to the moon? (Distance to
moon from earth 364,000 km)
4. Assuming that each human being has 60 trillion
body cells (6.0 x 1013) and the Earth's population is 7 billion (7 x
109), what is the total number of living human body cells on the Earth at
the present time?