What is true about Radians (check all that apply) Question 1 options:

Its the angle swept out by the distance on the circumference of the circle that is the same length as the circles radius.

2*pi*rad = 360 deg.

It is the ratio of two lengths.

There about 57 radians in 1 deg.

Apiping systems consists of 6 m of 6-std type k and 12 m of 4-std type k, both drawn copper tubing. the system conveys ethylene glycol at a rate of 0.013 m3/s. the pressure drop across the system is to be calculated. there are two 90° elbows in the 6-in pipe, a reduction from the 6-in pipe to the 4-in pipe and four 90° elbows in the 4-in pipe. all fittings are soldered (same as flanged) and regular. the inlet and outlet of the system are at the same height.