In radioactive decay processes, a very important concept is the half-life time, which is the time it takes for the parent nuclei to decompose into child nuclei.

expressed this mathematically is

N = N₀ $e^{- \lambda t}$

for the average life time

N₀ / 2 = N₀ $e^{- \lambda T_{1/2}$

T = $\frac{ln 2x}{ \lambda}$

Analyzing this expression, the nuclei that decay are the so-called parents and the new nuclei called children appear.

when checking the answers the correct one is C

3 0

3 years ago

If e is the electric field near an infinite sheet of charge and E is electric field between two similarly charged parallel plate

PolarNik [594]

Answer:

* the two plates of the same sign E = 0

* the two plates of different sign E/e = 2

Explanation:

In this exercise, the relationship between the field created by a plate and two infinite plates is asked.

The electric field created by each plate has the value of "e", which is related to the charge on the electric plate.

e = $\frac{ \sigma }{2 \epsilon_o}$

If the plate is negative the electric field is directed towards the plate and if the plate is positive the electric field is directed out of the plate.

The test charge is always positive.

When we have two plates, we have several possibilities

* the two plates of the same sign

therefore the resulting electric field on the test charge is

E_total = e - e

E = 0

* the two plates of different sign

E_total = e + e

E = 2 e

the relationship between the two fields is

E/e = 2

6 0

3 years ago