John has traveled from a distant planet to spend one earth year visiting with us. However, one year on earth is not the same as one year on john's planet. on john's planet: 10 seconds = 1 minute

10 minutes = 1 hour
10 hours = 1 day
10 days = 1 week
10 weeks = 1 month
10 months = 1 year
How much time passed on john's planet during the one year he spent on Earth?

depends.

one John-planet year is 10^6 John-planet seconds, but how do those seconds relate to earth seconds?

To calculate how much time passed on John's planet during the one year he spent on Earth, we need to convert the Earth time to John's planet's time using the given conversion rates.

First, let's convert one Earth year to John's planet's time:

1 year = 12 months (on Earth)

Now, let's convert each unit of time from Earth to John's planet:

1 Earth month = 10 weeks (on John's planet)
So, 12 Earth months = 12 * 10 weeks = 120 weeks (on John's planet)

1 Earth week = 10 days (on John's planet)
So, 120 weeks = 120 * 10 days = 1200 days (on John's planet)

1 Earth day = 10 hours (on John's planet)
So, 1200 days = 1200 * 10 hours = 12,000 hours (on John's planet)

1 Earth hour = 10 minutes (on John's planet)
So, 12,000 hours = 12,000 * 10 minutes = 120,000 minutes (on John's planet)

1 Earth minute = 10 seconds (on John's planet)
So, 120,000 minutes = 120,000 * 10 seconds = 1,200,000 seconds (on John's planet)

Therefore, during the one Earth year John spent on Earth, 1,200,000 seconds passed on John's planet.