Posted by **qwerty** on Friday, April 25, 2014 at 9:33am.

A roughly spherical asteroid with a diameter of 1 km, and a mean density of 4 g/cm^3, hits the Earth with a relative speed 1.5 times the orbital velocity of the Earth. Compute the amount of energy released upon the impact. Compare that with the energy released by a 10-Megaton thermonuclear bomb, which is about 4.2 x 10^27 erg. Contemplate the value of a search for Earth-crossing asteroids. Please be sure to enter your answer in units of ergs (the CGS unit of energy). Note: 1 Joule = 10^7 ergs.

Energy released upon impact:

- Astronomy -
**a**, Friday, April 25, 2014 at 2:51pm
12435

- Astronomy -
**abc**, Monday, April 28, 2014 at 3:06pm
2.089*10^28

- Astronomy -
**Anu**, Saturday, May 3, 2014 at 11:33am
2.089*10^28

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