To find the distance between two small towns, an electronic distance measuring (edm) instrument is places on a hill from which both towns are visible. the distance from the edm to the towns is 4.2 miles and 4 miles and the angle between the two lines of sight is 69 degrees. find the distance between the towns to the nearest tenth of a mile.

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)