6 km/s to the spacecraft. To undertake the same mission with a chemical propulsion system would require a more expensive launch vehicle and a larger spacecraft to accommodate a large tank for the chemical propellants.'"Again Karl switched slides.This slide has a couple of interesting questions. "How much time would a spacecraft using ion propulsion take to get to Mars? Can the technology be used for a manned mission to Mars? The answers will depend on choices and goals. Ion propulsion could be used for a manned mission to Mars. The decision on whether that would be the preferred approach would involve many questions such as which technique might get the crew there the fastest (independent of how fuel efficient the trip might be) in order to reduce the radiation exposure and effects of long periods of near weightlessness."Karl smiled when he saw the question on this screen.I grinned at Karl's reaction. Typical guy's attraction to speed. "The next question will be interesting for those. Those were my instructions." "Deal! So what are you preparing? Smells delicious." "Eggs Benedict on whole grain muffins with turkey bacon, fresh squeezed orange juice, fresh fruit..." I cut her off, "Fine, fine. I'll go wake the kids" I chuckled to myself.I expected to find two sleeping beauties, but to my surprise what I found were two girls in a tight embrace, kissing passionately, and hands between each other's legs. "Hey! Who gave you permission to start without me?" I was mostly joking but the volume of my voice startled JJ and Abbey who immediately split apart. "We're sorry they echoed in unison." "Breakfast is ready." Valerie yelled from the kitchen. I rummaged through the choices in the closet and pulled out two extremely skimpy silk chiffon halter nighties and matching thongs. "Put these on and join us in the dining area." I told the girls.A few minutes later as I sat at the table nibbling on some fruit, Abbey and JJ walking in. Wow, they were a sight to see! The teddy style.
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