Answer:
If lone pairs of electrons, electrons not bonded to other atoms, are located in the molecule, this will change the molecular geometry, not the electron geometry. If all the electron groups are bonded, with no lone pairs, then the electron geometry and molecular geometry are the same.
Answer:very hot
Explanation:
trust me have faith in god
Answer:
(1/2)*n = .05 by the definition of half-life where n is the number of half-lives
n ln .5 = ln .05
n = ln .05 / ln .5 = 4.32 number of half-lives
So 4.32 * 20 = 86.4 years has passed
Actually, they only want the mass left. However, all that has changed is that
95% of the original radioactive atoms have changed to a different form of about the same amount of mass. The amount of mass remaining would be about the same. Also, one doesn't know the percentage of radioactive atoms
that formed the original mass.
Rt = 3 ohms
Explanation:
Let R1 = 4-ohm resistor
R2 = 12-ohm resistor
For 2 resistors connected in parallel, the total resistance Rt is given by
1/Rt = 1/R1 + 1/R2
or
Rt = R1R2/(R1 + R2)
= (4 ohms)(12 ohms)/(4 ohms + 12 ohms)
= 48 ohms^2/16 ohms
= 3 ohms
Responder:
Explicación:
El bus de preguntas incompleto. Aquí está la pregunta completa
Una barra de metal de 2 m de largo recibe una fuerza que provoca un alargamiento o variación en su longitud de 0,3 cm. ¿Cuál es el valor de la tensión unitaria o deformación lineal? R = 1,5
La deformación lineal se define como la relación entre la extensión de un material y la longitud original. La cepa no tiene unidad.
Deformación = extensión / longitud original
Dada la longitud original del metal = 2 m = 200 cm
Extensión = 0.3cm
Sustituir
Deformación lineal = 0.3 / 200
Deformación lineal = 0,0015