The longest stretch of straight railroad tracks lies across the desolate Nullarbor Plain, between the Australian cites of Adelaide and Perth. The tracks extend a distance of 478 km without a curve. How long would it take a train moving at a constant speed of 97 km/h to travel the length
of this track?

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

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

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.