Create an inexpensive, DIY birdbath with nothing more than a pile of stones -- here's what to know about this DIY before you ...
Starting from a pine board, we are going to make a circle with a diameter of 55 cm. To do this, we will hammer a nail into ...
Make sure your angles are in units of radians (not degrees), where 2π radians = 360 degrees. But after that you will get the value of R (the radius of Earth) in the same units that you measured the ...