What is a basic fact about Ceres that makes us think it has a lot of water in its interior, probably in the form of ice? a Ceres is tidally heated due to its elliptical orbit around Jupiter, so it can't be mostly solid rock. b The H.E.D. meteorites come from Ceres, so we have samples of some of its ice here on Earth. c The Dawn spacecraft send radar beams through Ceres, and they were partially absorbed by deposits of water ice. d Its density is too low to be made mostly of rock.

What is a basic fact about Ceres that makes us think it has a lot of water in its interior, probably in the form of ice? a Ceres is tidally heated due to its elliptical orbit around Jupiter, so it can't be mostly solid rock. b The H.E.D. meteorites come from Ceres, so we have samples of some of its ice here on Earth. c The Dawn spacecraft send radar beams through Ceres, and they were partially absorbed by deposits of water ice. d Its density is too low to be made mostly of rock.

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You are out on a date, eating dinner in a restaurant that has several television screens. Most of the screens are showing sports events, but one near you and your date is showing a discussion of an upcoming voyage to Mars. (a) Your date says, "I wonder how long it takes to get to Mars?” Wanting to impress your date, you grab a napkin and draw Figure P13.9 on it. Even more impressively, you tell your date that the minimum-energy transfer orbit from Earth to Mars is an elliptical trajectory with the departure planet corresponding to the perihelion of the ellipse and the arrival planet at the aphelion. You pull out your smartphone, activate the calculator feature, and perform a calculation on another napkin to answer the question above that your date asked about the transfer time interval to Mars on this particular trajectory. (b) What If? Your date is impressed, but then asks you to determine the transit time to an inner planet, like Venus.
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Can you please solve this on notebook paper by using GRASS Format.
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