90Th234 What element atom is formed when the thorium nucleus is оруулах-decomposed?

Physics

1 answer:

Archy [21]3 years ago

8 0

This question is from course hero.

So better check this question!

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Each time you dumped the pennies, one half-life passed; it has been shown that the half-life for this radioactive isotope is 20

tresset_1 [31]

The exponential decay function is shown as:

At = Ao*2^(-t/h)

Where:

At = Final amount
Ao = original amount
t = time
h = years for half-life to occur

We are not given the original and final amounts, but we are told that after the certain amount of time had passed, only 5% had remained. So if we were to isolate At and Ao in one side of the equation, such that: At/Ao = 0.05, we can solve for the missing variable, which is t.

Substituting:

At/Ao = 2^(-t/h)
0.05 = 2^(-t/20)
t = 86.44 years

Therefore, the pottery was made approximately 86.44 years ago.

3 0

3 years ago

Darina [25.2K]

Resolving vectors question. See diagram enclosed.

4 0

3 years ago

With some manipulation, the rydberg equation can be rewritten in the form e=constant×(1nf2−1ni2) which allows you to calculate t

Alinara [238K]

The value of the constant needed to complete in joules to three significant figures is 2.18 x 10^-18 J.

6 0

4 years ago

An instructor gives a demonstration in which he makes a standing wave on a long thin slinky. The slinky is 6.0 meters long. If y

Naily [24]

The characteristics of standing waves allows to find the result for the speed of the wave is:

The speed wave is: v = 10 m / s

The wave is a way of transmitting energy without mass displacement, , in the attachment we can see a diagram of the standing wave.

Each cycle corresponds to half a wavelength, they indicate that the frequency is 2.50 Hz and there are three cycles, so the wavelength is:

L = $n \frac{\lambda}{2}$