# angle

1. ### What is the correct formula to calculate the angle of vector A = 0i + 1j

I know the angle is 90 degrees. and the formula to calculate the angle of vector A is inverse tan of (Ay / Ax), but Excel returns an error message because Ax is zero. Thanks.
2. ### L Angle Capacity

Hi there people, Need help with our situation. Mirror: 2440mm x 1500mm x 50mm wide. Weight: 150kg We want to mount the mirror against a brick wall (floating style) and plan on using aluminium L angles to support the TOP and bottom of the mirror. I would like to determine if the 50mm x...
3. ### Need Help: L angle capacity

Hi there people, Need help with our situation. Mirror: 2440mm x 1500mm Weight: 150kg We want to mount the mirror against a brick wall (floating style) and plan on using aluminium L angles to support the TOP and bottom of the mirror. I would like to determine if the 50mm x 50mm x 3mm...
4. ### A question regarding vectors and angle between vectors

In my attempt, I got 2 answers √3 and 1 but the solutions say that the answer is only √3. Am I missing something? Sent from my S6 using Tapatalk
5. ### Angle of space motion and radial-velocity vector

Hello So I am trying to figure out the angle of a space motion vector with its radial velocity vector. I have to sample equations, but despite plugging in the numbers I am not getting the same answers. So I have: tan-1((4.74d(u")/(vr)) With: d = 5.14 pc u" = 0.66092" vr = -26.3km s-1...
6. ### If A = i + j + k and B = -I + -j + -k, then (A-B) will make angle with A?

If A = i + j + k and B = -i + -j + -k , then (A-B) will make angle with A? What is the concept behind it, could you please explain with a diagram? (this is the part from scalar and vector)
7. ### The angle between P and Q?

The resultant R of vectors P and Q is perpendicular to P and R=P both, then the angle between P and Q is what? Now, what is the concept behind it? Could you provide me with an image of the resultant perpendicular to two vectors so that I can understand the concept and start solving the problem?
8. ### Acceleration depending on angle

Hello all again I tried to solve this problem but i failed , could any one help me to solve it ? i will be so thankful . Best regards Razi
9. ### Calculate Range and Angle

Hi, Iam working for project.. I have a below requirement My project objective is to find the angle and range for the particular Target I have 4 units, Camera, Target, Displayunit,Tanker camera will find the target in distance of 40km, that information(angle & range) will sent to display...
10. ### Derivation of Critical Angle

Hi, I've derived the critical angle: n1*sin(x1) = n2*sin(x2) x1 is critical angle of incidence, call it C. x2 is refracted at 90 degrees, therefore sinx2 = 1 so you get sinC = n2/n1. However, in my syllabus it is written as sinC = 1/n Can someone please explain to me how...
11. ### Find launch angle

I found this question in a textbook and the calculation was not shown. The launch velocity is 6 times the velocity at maximum height, find launch angle. Can someone help me by showing me calculations.
12. ### How do different angle bends in pipes affect flow?

Hi, I am currently doing an experiment where a piece of 5mm diameter plastic tubing has different angle bend in it (e.g. 10 degrees, 25 degrees... 90 degrees etc.) and was wondering what equations to use to figure out what affects the rate of flow when water is going through it? Do i use...
13. ### Bring a laser beam to the center of a telescope, undependent of initial angle

Sry for the confusing title, I don't know a better one for my Problem ;) Ok, i struggle with the following: I have a laser beam that gets reflected with an AOD (to different angles), then moves through a beam expander and a collimator and hits a telescope, that focuses the beam to a small...
14. ### Angle of a Banked Roadway

While reading the chapter for uniform circular motion, one of the examples details finding the angle of a banked roadway given the maximum speed and radius. The equations for forces in horizontal and vertical directions are: (1) ncosθ=mg (2) nsinθ=mv^2/r where n is the normal force...
15. ### would forward force lessen this angle?

Suppose you have a person swinging / pushing a racket at a ball at an angle that is between forward and down, so e.g. down to the ground in the distance. That's scenario A. Now scenario B suppose instead, the same person is running and then hitting it with the racket tilt and swing at the...
16. ### Incidence angle - tilted plate

Would you please be able to assist on the following question: A vertical plate is subjected to rays from a light source located 35 degrees above the horizon. The plate itself is tilted 12.5 degrees around its vertical axis reducing the exposure to the light source. Find the incidence angle...
17. ### Incidence angle - tilted plate

Would you please be able to assist on the following question: A vertical plate is subjected to rays from a light source located 35 degrees above the horizon. The plate itself is tilted 12.5 degrees around its vertical axis reducing the exposure to the light source. Find the incidence angle...
18. ### Incidence angle - tilted plate

Would you please be able to assist on the following question: A vertical plate is subjected to rays from a light source located 35 degrees above the horizon. The plate itself is tilted 12.5 degrees around its vertical axis reducing the exposure to the light source. Find the incidence angle...
19. ### General Launch Angle problem

A football quarterback shows off his skill by throwing a pass 45.10 m downfield and into a bucket. The quarterback consistently launches the ball at 39.00 ∘ above horizontal, and the bucket is placed at the same level from which the ball is thrown. What initial speed is needed so that the...
20. ### Working out the perfect angle.

This is really long winded, and I'm only good with astro physics. Any way. The answer could be done via trial and error, but Id rather take a more professional rout. I have; A tank that can hold 5 Liters of water. A Pipe with the dimensions of 6mm X 500mm I want to feel a pint glass...