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math
An angle of 1.8 radians at the center of the circle subtends an arc of length 23.4cm. Find: (a) The radius of the circle (b) The area of the sector enclosed by the arc and the radii.
asked by kudu on February 24, 2015 
college physics
A conductor in a shape of a spherical shell of radii 10 and 12cm in charged to 20 micro coloumb. 1) Find the electric field at the following radii: 2,11,15 cm. 2)Find the electric potential at each of these radii. Repeat part 1
asked by vishal on October 9, 2013 
maths
Equilateral triangle ABC has a circumcircle Γ with center O and circumradius 10. Another circle Γ1 is drawn inside Γ such that it is tangential to radii OC and OB and circle Γ. The radius of Γ1 can be expressed in the form
asked by hemant on May 22, 2013 
math
Equilateral triangle ABC has a circumcircle Γ with center O and circumradius 10. Another circle Γ1 is drawn inside Γ such that it is tangential to radii OC and OB and circle Γ. The radius of Γ1 can be expressed in the form
asked by Mathslover on May 25, 2013 
GEOMETRY(CIRCLE)
Three circles with different radii have their centers on a line. The two smaller circles are inside the largest circle, and each circle is tangent to the other two. The radius of the largest circle is 10 meters. Together the area
asked by i need help from anyone! on March 25, 2013 
Math
The points (4, –5) and (– 4, 1) are endpoints of a diameter of a circle. (a) Find the center of the circle. (b) Find the length of the radius of the circle. (Note that this is a distance.) Give the exact answer. Show work. (c)
asked by Kate on June 24, 2009 
geometry
Given Circle D, if AC = 16 units, then what is the length of CB? A circle is drawn with center D. Two radii are drawn, AD and DC. Segment AC is drawn with a perpendicular, DB.
asked by Rob on August 31, 2010 
Math
I have a question my brother asked me but I need a math expert. You have two interlocking circles and the radius of circle B goes through the center of circle A and of course the radius of circle A goes through the center of
asked by DrBob222 on June 25, 2013 
calculus
Find all possible radii of circle centered at (3,6) so that the circle intersects only one axis
asked by Jack on September 13, 2010 
mathgeometry
The sum of the radii of two concentric circles is 40. A chord with length 36 of the larger circle is trisected by the smaller circle. The area of the smaller circle is k*pi. Find the value of k. Express your answer as an exact
asked by paragon on January 17, 2008 
precalculus
The acceleration acting on a falling object due to gravity varies inversely with the square of the object's distance from the center of Earth. At the surface of Earth, where x = 1 Earth radius, the acceleration is y = 9.8 m/s2 1.
asked by Anonymous on January 20, 2011