Aforce of 140 140 newtons is required to hold a spring that has been stretched from its natural length of 40 cm to a length of 60 cm. find the work done in stretching the spring from 60 cm to 65 cm. first, setup an integral and find a a, b b, and f ( x ) f(x) which would compute the amount of work done.

What are igneous intrusions and extrusions

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?