There is no "radian of a straight line", as far as I know. A radian is a unit of angular measurement - defined in such as way that a complete circle (also known as 360°) is equivalent to 2 x pi.
On many calculators, the MODE key/button is to set the calculator into degrees or radian angle measurment, that is, when you enter a value, it and all further values you enter will then either be understood by the calculator as a degrees or radian value for an angle.
You do not convert. STERADIAN is a two dimensioal measurement RADIAN is a one dimensional measurement. Just as you cannot convert area into degrees (of angular measurement)
5
sin(49) = - 0.9537526528 ------------------------------In radian mode. sin(49) = 0.7547095802 -----------------------------In degree mode.
One revolution = tau radians (or 2*pi radians).
1 revolution = 2pi radians therefore; 1 radian = 1revolution/2 pi radians = 0.159154943 revolution
One radian is about 57.3 degrees
1 rotation/1 min * 1 min/60s * (2*Pi radian/1 rotation)
"Radian" is a distance. "Revolution per minute" is a speed. Those two units measure different quantities, and they don't convert into each other. It'll help to know that 1 revolution is (2 pi) radians. So "one revolution per minute" is "2 pi radians per minute", etc.
There is no relationship between electric charge and a radian which is an angular measurement.
Meter is a unit of length. Radian is a unit of angle. They don't relate.
Fractions of a revolution make sense, e.g. 360 degrees = 1 revolution 180 degrees = 1/2 revolution 137 degrees = 137/360 of a revolution 2pi radians = 1 revolution 1 radian = 1/(2pi) revolution
180
180
The radian is 0.523598776
1 rad = 57.3°