- #1

Alyshea

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**1. An asteroid of 1.0 km diameter will make a crater of about 10 km diameter. How much kinetic energy does the asteroid have if it strikes the surface at about 20km/s. Convert answers to megatons of TNT; 1 megaton = 4 X 10^15 Joules.**

**2. I do not understand how there is enough information given to solve this problem. I know that KE= (1/2) mv^2 but I do not know the mass. So I tried to find the mass of a circle, but then you need density, which I also do not have. I am completely lost.**

**3. Any suggestions would be helpful! Thank you**