A future use of space stations may be to provide hospitals for severely burned persons. It is very painful for a badly burned person on Earth to lie in a bed. In a space station, the effort of gravity can be reduced or eliminated. With what period of rotation would a doughnut-shaped hospital of 200 m. radius have to rotate, if persons on the outer perimeter are to experience 1/10 the gravity effect of Earth?

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

Which best describes what forms in nuclear fission? a. two smaller, more stable nucleib. two larger, less stable nucleic. one smaller, less stable nucleusd. one larger, more stable nucleus

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.