What we're up against

This is just one cell in the human body! It must be covered in thousands of coronaviruses! But the total number of viruses involved in an infection will be much much larger!

Exercise 1

Move all four sliders into the correct positions.

Number of people on Earth:

size {{fermi.people}}

Number of grains of rice in India:

size {{fermi.rice}}

Number of students in your school:

size {{fermi.students}}

Number of hours in a year:

size {{fermi.hours}}

Correct! The number of grains of rice in India has order of magnitude at least 10^13. The number of people on Earth is on the order of 10^9. And the number of hours in a year is 8760, which is most likely more than the number of students in your school.

area

The sliders are not in the correct positions yet! Keep working.