2. a) The average life span for a dog is 12 years. Ifa dog is placed on a space ship traveling at 0.998 c what will be the average life span of the dog according to someone en the space ship? b) An observer on earth sees a space ship traveling at 0.999c. According to the earth observer, the space ship travels 20 light years. Is the 20 light years a proper or contracted length? ) A physicist in a lab creates a new particle which travels for 20 km before decaying According to the physicist the time it takes the particle to decay is 335 x 10s Is the 20 km a proper of contracted length? Is the 335 x 10"sa proper or dilated time?

2. a) The average life span for a dog is 12 years. Ifa dog is placed on a space ship traveling at 0.998 c what will be the average life span of the dog according to someone en the space ship? b) An observer on earth sees a space ship traveling at 0.999c. According to the earth observer, the space ship travels 20 light years. Is the 20 light years a proper or contracted length? ) A physicist in a lab creates a new particle which travels for 20 km before decaying According to the physicist the time it takes the particle to decay is 335 x 10s Is the 20 km a proper of contracted length? Is the 335 x 10"sa proper or dilated time?