If the diameter of a circle is 1.3 x 10 ^-12 meters what is it's radius
2007-02-24 11:05:06 · 8 answers · asked by donnam4863 2 in Science & Mathematics ➔ Mathematics
2r=d
where r is the radius and d is the diameter
so just divide the diameter by 2
.65x10^-12
so the radius would be 6.5x10^-13
2007-02-24 11:08:30 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Diameter is the line that passes from one side of the circle through the center to the other side of the circle. The radius is half of diameter, ie radius starts at center of circle and reaches on one side of the circle,
r = d/2 (r is radius, d is diameter)
r = (1.3 x 10 ^-12) / 2
= 6.5 x 10^-13
2007-02-24 19:16:50 · answer #2 · answered by aamna 2 · 0⤊ 0⤋
It's half of that, 6.5 x 10^(-13) m, or 6.5 x 10^(-11) cm.
This is too large to be the size of an atomic nucleus but much smaller than the innermost electronic orbit's "radius" in a hydrogen atom. In fact, it's about the size of the innermost electron's orbit in a certain heavy element. Are you asking this question from Iran ?!
2007-02-24 19:07:55 · answer #3 · answered by Dr Spock 6 · 0⤊ 0⤋
1/2(1.3 x 10 ^-12) meters = 0.65 X 10^-12 meters
= 6.5 X 10^-13 meters
2007-02-24 19:10:06 · answer #4 · answered by ironduke8159 7 · 0⤊ 0⤋
.5 times the diameter.
2007-02-24 19:18:57 · answer #5 · answered by JOHNNIE B 7 · 0⤊ 0⤋
the radius is half of diameter.
2007-02-24 19:11:32 · answer #6 · answered by 7 · 0⤊ 0⤋
(1.3 * 10^(-12))/2
(1.3/2) * 10^(-12)
.65 * 10^(-12)
(6.5 * 10^-1) * 10^(-12)
6.5 * 10^(-1 + (-12))
6.5 * 10^(-13)
2007-02-24 20:42:33 · answer #7 · answered by Sherman81 6 · 0⤊ 0⤋
6.5x10^-13
2007-02-24 19:07:23 · answer #8 · answered by bruinfan 7 · 0⤊ 0⤋