R , or r, is the eighteenth letter of the English alphabet.
R or r may also refer to:
In electrical engineering, impedance matching is the practice of designing or adjusting the input impedance or output impedance of an electrical device for a desired value. Often, the desired value is selected to maximize power transfer or minimize signal reflection. For example, impedance matching typically is used to improve power transfer from a radio transmitter via the interconnecting transmission line to the antenna. Signals on a transmission line will be transmitted without reflections if the transmission line is terminated with a matching impedance.
Q, or q, is the seventeenth letter of the English alphabet.
RT may refer to:
Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities. Those Greek letters which have the same form as Latin letters are rarely used: capital A, B, E, Z, H, I, K, M, N, O, P, T, Y, X. Small ι, ο and υ are also rarely used, since they closely resemble the Latin letters i, o and u. Sometimes, font variants of Greek letters are used as distinct symbols in mathematics, in particular for ε/ϵ and π/ϖ. The archaic letter digamma (Ϝ/ϝ/ϛ) is sometimes used.
C is the third letter in the Latin alphabet.
E is the fifth letter of the Latin alphabet.
D is the fourth letter of the Latin alphabet.
Z, or z, is the twenty-sixth and last letter of the English alphabet.
R-value or rvalue may refer to:
Gamma is the third letter of the Greek alphabet.
T, or t, is the twentieth letter of the English alphabet.
N is the fourteenth letter of the English alphabet.
B is the second letter of the Latin alphabet.
A is the first letter of the Latin and English alphabet.
F is the sixth letter of the Latin alphabet.
G is the seventh letter of the Latin alphabet.
H is the eighth letter of the Latin alphabet.
L, or l, is the twelfth letter of the English alphabet.
P, or p, is the sixteenth letter of the English alphabet.
U, or u, is the twenty-first letter of the English alphabet.
