Question: specific orbital energy of −29.8 MJ/kg has what orbit?
SQL: SELECT "orbit" FROM "2-143696-2" WHERE "specific orbital energy" = '−29.8 MJ/kg';

Question: altitude above the Earth's surface of 500 to 39,900 km has what orbital period?
SQL: SELECT "Orbital period" FROM "2-143696-2" WHERE "altitude above the Earth's surface" = '500 to 39,900 km';

Question: specific orbital energy of −0.5 MJ/kg is what altitude above the earth's surface?
SQL: SELECT "altitude above the Earth's surface" FROM "2-143696-2" WHERE "specific orbital energy" = '−0.5 MJ/kg';

Question: Earth's surface of 357,000 to 399,000 km has what orbit altitude above?
SQL: SELECT "orbit" FROM "2-143696-2" WHERE "altitude above the Earth's surface" = '357,000 to 399,000 km';

Question: Orbital period of 89 to 128 min has what specific orbital energy?
SQL: SELECT "specific orbital energy" FROM "2-143696-2" WHERE "Orbital period" = '89 to 128 min';

Question: center-to-center distance of 6,900 to 46,300 km involves which orbital period?
SQL: SELECT "Orbital period" FROM "2-143696-2" WHERE "center-to-center distance" = '6,900 to 46,300 km';