# angles

1. ### How to find wall angles of a CD nozzle?

I'm designing a cd nozzle type restrictor for an engine air intake, to obtain best performance. Im having difficulty finding wall angles for the same, i only have inlet conditions (pressure,velo,etc), diameter of inlet ,throat and outlet. The length shall be determined by the angles itself and...
2. ### normal contact force with angles

A small smooth ring R, of mass 0.6 kg, is threaded on a light inextensible string. One end of the string is attached to the fixed point A and the other end is attached to a ring B, of mass 0.2 kg, which is threaded on a fixed rough horizontal wire which passes through A (see diagram (excuse the...
3. ### two projectiles launched at angles

1. an archer shoots an arrow at an angle of 20degress above the horizontaland the arrow lands at the same ht. 4 sec later find intial velocity find horizontal velocity of the arrow determine max ht. determine horiz. range 2. a cannon is fired at an angle of 45degrees above the horiz...
4. ### angles in inclined plane

I just want to understand why the angle theta in the inclined plane is equal to the thete between the y-axis and the gravity when you want the aixs to be parallel to the plane. I really don't understand why the theta between the y-axis and gravity will be equal to the inclined plane. I know...
5. ### angles between vectors

I have 1 problems that is killin me, i have no idea how to start it. part1. What is the angle between vectors E and F in the figure? and (part 2 asked me to find the magnitude, which i was able to do) part3. Use components to determine the direction of G=E+F. Find , the angle between...
6. ### Vectors and angles

The treasure map in the figure gives the following directions to the buried treasure: "Start at the old oak tree, walk due north for 490 paces, then due east for 130 paces. Dig." But when you arrive, you find an angry dragon just north of the tree. To avoid the dragon, you set off along the...
7. ### lens questions about focusing light coming in from different angles to one set angle

Hi, I was wondering if there is a coating or a lens that can focus light coming in from all different angles to a certain angle when it leaves the lens. Basically it would straighten all light coming in from all different, random angles to one set angle without diminishing the incoming...
8. ### sum of the angles in coordinate system

In 2D coordinate system the sum of the angles of all quadrants=360 degree in (x,y) plane Case 2 In 3D coordinate system (x,y,z) I took 3 possible plane i.e. (x,y) (y,z) (x,z) each plane provides angle of 360 degree, so can we say that in 3D coordinate system sum of all quadrants is 1080? Because...
9. ### angles of superposition for two diffracted wavelengths

two wavelengths are diffracted one 400 nm and the other 600 nm. they have one point of superposition at 20^o now i need to find if the angle of the other if any point of superposition for the two wavelengths. the answer is supposed to be 43.3^o. i tried equating them...
10. ### "The Music" (angles, focal length, lenses, etc.) URGENT

The well known 17th Century Dutch painter Johannes Vermeer only painted 30 paintings during his life. However, they were created with incredible, almost photographic-like detail. The use of perspective was ahead of his time. Recently, many have come to wonder how Vermeer created such...