Posted by **Paul** on Saturday, May 26, 2007 at 12:30pm.

How do I predict how long will it take for lava to reach the town, which is 10km from the lava vent, if I know that after 2 days lava was 5 km far from the vent.

Thank you

Lava traveled 5 km in 2 days. How long will it take for lava to travel 10 km?

But what about speed?

If you wish to calculate the velocity (rate), it is

distance = rate x time

5 km = rate x 2 days.

rate = 5 km/2 days = 2.5 km/day. Then, knowing the rate we can calculate the time for a new distance. That would be

distance = rate x time

10 km = 2.5 km/day x time and solve for time. Of course you can change all this to km/hour or some other time unit you wish; however, we assume that it travels at the same speed so 5 km in 2 days means 10 km in 4 days or 15 km in 6 days, or 20 km in 8 days etc.

## Answer this Question

## Related Questions

- science - Does the temperature of the water affect the reaction of a lava lamp? ...
- science - Does the temperature of the water affect the reaction of a lava lamp? ...
- science - what are some similarities between Pahoehoe lava and Scoria aa lava?
- Science - which of the following is an example of a mineral? silver, lava, ...
- geology (science) - Why do some formations have low viscosity basaltic lava and ...
- science - the specific heat capacity of lava is 1600 j kg -1 oC -1. when all the...
- Science - (1)Suppose a lava flow was found between two sedimentary rock layers. ...
- Chemistry *URGENT* - URGENT help! 3. A rock sample was dated using potassium-40...
- science - The specific heat capacity of the lava is 1600 J kg^-1. when all the ...
- science - The specific heat capacity of the lava is 1600 J kg^-1 degres celsuis...