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Pie/2

=22/7/2

Angle in radians =

Total length of the arc/radius of the circle

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Anonymous

5y ago

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Half of a circle?

A semicircle is half of a circle, formed by cutting a circle along its diameter line. It has the same curved edge as a circle but only covers half the area. The formula for the area of a semicircle is 1/2 times π times the radius squared.


A rod of length L has total charge Q distributed uniformly along its length it's then bent in the shape of a semicircle find the magnitude of the electric field at the centre of semicircle?

At the center of the semicircle, the electric field due to the straight part of the rod will cancel out because of the symmetry. The electric field at the center of the semicircle is only due to the curved part, so you can treat the semicircle as an arc of a circle with charge distributed along its length. You can then calculate the electric field using the formula for the electric field of a charged arc of a circle.


What is a figure that has one straight line?

A semicircle is an example of a figure with one straight line. It is a circle that has been split along the diameter.


The direct distance between city A and city B?

Is along the arc of the Great Circle which is an imaginary circle with its centre at the centre of the earth and the two cities on its circumference. This is why the direct routes between some cities go over the pole rather than follow latitudes.


What is the electric field at a point outside a nonuniform semicircle of charge?

The electric field at a point outside a nonuniform semicircle of charge is not constant and varies depending on the distribution of charge along the semicircle. The electric field can be calculated using the principle of superposition, taking into account the contributions from each element of charge along the semicircle. The direction and magnitude of the electric field at a specific point can be determined by integrating the contributions of all the charge elements.


An ion in a mass spectrometer follows a semicircular path of radius 15.2 cm What is the magnitude of the displacement?

The magnitude of the displacement of an object that has traveled in a semicircle (a half circle) is not the DISTANCE that it traveled, but the shortest distance between it's starting point and it's ending point. This means that the diameter of the semicircle = the displacement, so 15.2*2=30.4 cm is the answer.


What is a line that intercects a circle at one point?

Generally, the equation of a circle is (x-a)2 + (y-b)2 = r2where (a,b) is the centre of a circle, and r is the radius.So you can use this equation along with a general line equation, y=mx+c, or using the gradient and finding the equation of the normal.


What is a point that is the same distance from each point?

It's the middle point of line. Hardly! How far would that be from a point 3/4 way along the line? Try centre of a circle, or of a sphere.


What shape is created when a circle is folded along the diameter?

When a circle is folded along its diameter, it creates two congruent halves or semicircles.


Why radian has no dimension?

The simplest explanation is that a radian is defined as the distance an angle would subtend along the circumference of a circle of radius "r" divided by the radius "r." If we call the subtended arc "a," then both "r" and "a" are measured in length units, which of course cancel out when the ratio "a" over "r" is taken.The easiest way to understand this is probably through an example. Take an angle of 30 degrees. If we construct a unit circle (radius = 1 unit) centered at the vertex of the angle, then we know the circumference of the circle is 2(pi)r = 6.283 units. We also know that the circumference of the circle is 360 degrees by definition, so a 30 degree angle subtends 30/360, or 8.3 percent of the circumference of 6.283 units, or 0.524 units. Thus, the angle in radians is the length of the subtended arc, 0.524 units, over the length of the radius, 1 unit, or 0.524 units/1 unit = 0.524 (with the units dimension canceling out).Since by definition, circumference = 2(pi)(r) = 360 degrees, it is easy to see that an arc of "r" units (that is one radian) = 360/(2(pi)) = 57.3 degrees and that there are 2(pi), or 6.28 radians in 360 degrees. If one radian = 57.3 degrees, then the 30 degree example above should equate to 30/57.3 = 0.524 radians, just as was shown.Bottom line is that an angle in radians defines a given subtended arc distance for a circle of any radius measured in any units, as long as it is centered at the vertex of the angle. If a circle of radius 57 hoozits is centered at the vertex, then an arc of length "57 times the angle in radians" hoozits is subtended. Similarly, if a circle of radius 23 cm is centered at the vertex, then an arc of length "23 times the angle in radians" cm subtended. In either case, the subtended angle in degrees is the angle in radians times 360/((2)(pi)).


Does the acceleration of a body moving in circular path remain constant?

If the speed of the object doesn't change, then yes.


What is the shortest most direct route between any two points on te surface of the earth?

Assuming the earth to be a perfect sphere, the shortest distance is an arc of the great circle. The two places and the centre of the earth define a plane. The great circle is the circle formed by the intersection of that plane and the surface of the earth. The shortest route between the two places is the smaller of the two arcs along that circle.