If 12 J of work are needed to stretch a spring from 8 cm to 12 cm and 20 J are needed to stretch it from 12 cm to 16 cm, what is the natural length of the spring?

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

Which type of basaltic lava flow has a fairly smooth

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.