In the 1950s an experimental train that had a mass of 33200kg was powered across a level track by a jet that produced a thrust of 5.03*10^5n for a distance of 494m. find the work done on the train

Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)

Suppose that f : rn → rm and that a ∈ k, where k is a connected subset of rn . suppose further that for each x ∈ k there exists a δx > 0 such that f(x) = f(y) for all y ∈ bδx (x). prove that f is constant on k; that is, f(x) = f(a) for all x ∈ k