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1. ### Equivalent spherical lens for someone with astigmatism?

A spherical equivalent only works up to a certain point for contact powers.. You... : - 4.25 - 2.00 X 40 left : -3.75 - 2.75 X 135 Spherical equivialent is just adding half the Cyl # to the sphere, but only...

5 Answers · Health · 11/02/2010

2. ### Multivariable Calculus, Spherical Coordinates?

Spherical Polar Coordinates are related to Rectangular...θ (1iii) so: x^2 + y^2 = r^2sin^2(θ) (2) and the infinitesimal volume in Spherical Polar Coordinates is: dV = r^2sinθ dr dθ dφ...

1 Answers · Science & Mathematics · 30/03/2013

Spherical coordinates: x = r∙sin(θ)∙cos(φ) y = r∙sin(θ)∙sin(φ) z = r...sin(θ) drdθdφ Basically uniqueness requires a restriction of the spherical coordinates to 0 ≤ r 0 ≤ φ ≤ 2∙π 0 ≤ θ ≤ π Consider...

2 Answers · Science & Mathematics · 07/04/2013

4. ### Triple Integral - Spherical ?

Using spherical coordinates: y = x√(19/125) ==> ρ sin θ sin φ = ρ cos θ sin φ...

1 Answers · Science & Mathematics · 08/11/2014

5. ### Why the planets are spherical in shape?

Planets stay basically spherical because any large deviations get crushed. ... pulled evenly toward the center, resulting in a spherical shape. Of course, planets are not perfect...

5 Answers · Science & Mathematics · 09/08/2008

6. ### Use spherical coordinates to evaluate the triple integral.?

Spherical coordinates: x = r∙cos(φ)∙sin(θ) y = r∙sin(φ)∙sin(θ) z = r∙cos(θ) Due to coordinate transformation...: 0 ≤ θ ≤ π/2 (note that polar angle θ is restricted to the interval [0;π] be definition of the spherical coordinate system) system) 0 ≤ φ ≤ π/2 Hence, ∫ ∫ ∫ 6∙z dV = ∫[4→5] ∫[0→π/2] ∫[0→π/2...

1 Answers · Science & Mathematics · 15/12/2011

7. ### Spherical Trigonometry?

...here but I will tell you a few things about it. Firstly a spherical triangle is like a plane triangle in that it has three sides but...

1 Answers · Science & Mathematics · 09/10/2011

8. ### SPHERICAL GEOMETRY???????????

... three statements might be taken as part of an axiom system for spherical geometry, but then they don't get proofs.) If you take spherical geometry...

2 Answers · Science & Mathematics · 10/11/2009

9. ### Spherical coordinates ?

Converting to spherical coordinates: x^2 + y^2 + z^2 = 4 ==> ρ = 2. x^2 + y^2 = 1 ==>...3 (since the region is above the x-axis), which is a plane. In spherical coordinates, this is given by ρ cos φ = √3 ==> φ...

2 Answers · Science & Mathematics · 12/12/2013

10. ### PhysicsReflection of spherical mirror & Plane mirror?

For spherical mirrors: f = -r/2, where f is the focal length and r...the directions appropriately, then continue them to the spherical mirror. From the mirror they will intersect at a point 6cm to the...

1 Answers · Science & Mathematics · 20/02/2018