Amajor motor company displays a die-cast model of its first automobile, made from 9.00kg of iron. to celebrate its hundredth year in business, a worker will recast the model in gold from the original dies. what mass of gold is needed to make the new model? the density of iron is 7.86 ✕ 10^3 kg/m3, and that of gold is 19.30 ✕ 10^3 kg/m3

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

Which of the following are guidelines to follow for obtaining accurate observations