The planet Alderaan has a mass of 6.29*10^ 24 kg and a radius of 5940 km. It rotates on its axis once every 3.7 hours. (a) Calculate the apparent weight of a 75 kg astronaut on the equator of Alderaan. (b) Alderaan has moon that circles the planet once every 38.2 hours. What is the radius of the moon's orbit?

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

Agas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kpa to a final volume of 0.065 m^3 while its temperature is kept constant. how much work is done by the system?

What is the primary force that suspension bridges use cables to hold their spans up? a. tension force b. resistance force c. normal force d. elastic force e. applied force