<p>Name: ______1 2 3 4 5 6 7 8 9 Due: ______Internet assignment go to my home page and click on the astronomy links. Questions 1 – 12 will be answered using the following link: Solar System Collisions http://janus.astro.umd.edu/astro/impact/ When at the web page enter the numbers for each situation and click on impact. *Note 1 megaton = 31,754,705 gallon gasoline The Hiroshima bomb was only .015 megatons</p><p>Situation 1  Target Earth (land) Projectile Composition: Iron  Projectile Diameter .1 km (which is about 110 yards)  Projectile Velocity 10km/s (which is 22,369 Mile/hour)  Hit Kaboom 1. What is the wrong with the above numbers? Too slow 2. What force makes asteroids accelerate as they approach earth? Gravity Situation 2  Target Earth (land) Projectile Composition: Iron  Projectile Diameter .1km (which is about 110 yards)  Projectile Velocity 15km/s (which is about 33,554 Mile/hour)  Hit Kaboom 3. How much energy is released? 110 MT 4. What does the web page use as a reference point to compare energy released? 100 MT nuclear war head 5. How frequent are impacts like this? 1,700 years 6. What is the crater’s depth? .3km Situation 3  Target Earth (land) Projectile Composition: Iron  Projectile Diameter .1km (which is about 110 yards)  Projectile Velocity 30km/s (which is about 67,108 Mile/hour)  Hit Kaboom 7. How much energy is released? 439 MT 8. The projectiles velocity was doubled in situation 3 when compared to situation 2. Did the energy released double? No quadruple 9. How frequent are impacts of this type? 5100 years 10. What is the crater’s depth? .4km Situation 4  Target Earth (land)  Projectile Composition: Iron  Projectile Diameter??? See question 11 and 12  Projectile Velocity 20km/s (which is about 44,738 Mile/hour)  Hit Kaboom 11. What is the smallest projectile diameter that will cause human extinction? 3.4 km or 2.1 miles 12. How frequent are impacts of this type? 11 million years</p><p>Situation 5  Go to the Earth Impact Effects Program http://www.lpl.arizona.edu/impacteffects/ and enter the information to answer the questions  Assume you are 500km away (about 310 miles)?  Diameter of Asteroid = (5km)  Density = (iron 8,000 kg/m3)  Impact Velocity: (20.00 km/s) (which is about 44738. Mile/hour)  Impact Angle: (45 degrees)  Target Type: (Sedimentary Rock) Questions 1.How much energy is released? 2 .50 x 10 7 MT or 25,000,000 MT 2. How often do impacts like this happen? 5.5 x 107years or 55,000,000 3. How big is the crater going to be? (diameter) 4. Define Thermal Radiation "fireball” - heat 5. What would you “feel” with respect to the Effects of Thermal Radiation? Clothing ignites - Much of the body suffers third degree burns - Newspaper ignites - Plywood flames - Deciduous trees ignite - Grass ignites 6. Seismic Effects: Would be similar to an earth quake of 9.6 on the Richter Scale. 7. Define air blast. 8. What sort of damage would result? Multistory wall-bearing buildings will collapse - Wood frame buildings will almost completely collapse - Highway truss bridges will collapse - Glass windows will shatter - Up to 90 percent of trees blown down; remainder stripped of branches and leaves 9. What did you learn or find interesting at this site. (do not leave blank) Name: ______1 2 3 4 5 6 7 8 9 Due: ______Internet assignment Go to my home page and click on the astronomy links. Questions 1 – 12 will be answered using the following link: Solar System Collisions http://janus.astro.umd.edu/astro/impact/ When at the web page enter the numbers for each situation and click on impact. </p><p>*Note 1 megaton = 31,754,705 gallon gasoline The Hiroshima bomb was only .015 megatons</p><p>Situation 1  Target Earth (land) Projectile Composition: Iron  Projectile Diameter .1 km (which is about 110 yards)  Projectile Velocity 10km/s (which is 22,369 Mile/hour)  Hit Kaboom 1. What is the wrong with the above numbers? ______2. What force makes asteroids accelerate as they approach earth? ____ Situation 2  Target Earth (land) Projectile Composition: Iron  Projectile Diameter .1km (which is about 110 yards)  Projectile Velocity 15km/s (which is about 33,554 Mile/hour)  Hit Kaboom 3. How much energy is released? ______4. What does the web page use as a reference point to compare energy released? ______5. How frequent are impacts like this? ______6. What is the crater’s depth? ______</p><p>Situation 3  Target Earth (land) Projectile Composition: Iron  Projectile Diameter .1km (which is about 110 yards)  Projectile Velocity 30km/s (which is about 67,108 Mile/hour)  Hit Kaboom 7. How much energy is released? ______8. The projectiles velocity was doubled in situation 3 when compared to situation 2. Did the energy released double? ______9. How frequent are impacts of this type? ______10. What is the crater’s depth? ______Situation 4  Target Earth (land)  Projectile Composition: Iron  Projectile Diameter??? See question 11 and 12  Projectile Velocity 20km/s (which is about 44,738 Mile/hour)  Hit Kaboom 11. What is the smallest projectile diameter that will cause human extinction? ______12. How frequent are impacts of this type? ______</p><p>Situation 5  Go to the Earth Impact Effects Program http://www.lpl.arizona.edu/impacteffects/ and enter the information to answer the questions  Assume you are 500km away (about 310 miles)?  Diameter of Asteroid = (5km)  Density = (iron 8,000 kg/m3)  Impact Velocity: (20.00 km/s) (which is about 44738. Mile/hour)  Impact Angle: (45 degrees)  Target Type: (Sedimentary Rock)</p><p>Questions 1.How much energy is released? ______2. How often do impacts like this happen? ______3. How big is the crater going to be? (diameter) ______4. Define Thermal Radiation ______5. What would you “feel” with respect to the Effects of Thermal Radiation? ______6. Seismic Effects: Would be similar to an earth quake of ______on the Richter Scale. 7. Define air blast. ______8. What sort of damage would result? ______9. What did you learn or find interesting at this assignment. (do not leave blank) ______</p>