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Colt1911 [192]
3 years ago
13

Potassium is a crucial element for the healthy operation of the human body. Potassium occurs naturally in our environment and th

us our bodies) as three isotopes: Potassium-39, Potassium-40, and Potassium-41. Their current abundances are 93.26%, 0.012% and 6.728%. A typical human body contains about 3.0 grams of Potassium per kilogram of body mass. 1. How much Potassium-40 is present in a person with a mass of 80 kg? 2. If, on average, the decay of Potassium-40 results in 1.10 MeV of energy absorbed, determine the effective dose (in Sieverts) per year due to Potassium-40 in an 80- kg body. Assume an RBE of 1.2. The half-life of Potassium-40 is 1.28 x 10°years.
Physics
1 answer:
andriy [413]3 years ago
3 0
Just grab a calculator
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max2010maxim [7]

Explanation:

the correct answer is Option 5.√½gh.

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5 0
3 years ago
An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. This moon takes 17601760 × 103 seconds (ab
Yuliya22 [10]

Answer:

The value is a_r  = 3.81 *10^{-3} m/s^2

Explanation:

Generally the moon's radial acceleration is mathematically represented as

a_r  =  r *  w^2

Here w is the angular velocity which is mathematically represented as

w =\frac{2 \pi }{ T}

substituting 1760 * 10^3 \ seconds for T(i.e the period of the moon ) we have

w =\frac{2  * 3.142 }{  1760 * 10^3}

=> w = 3.57 *10^{-6} \  rad/s

From the question r(which is the radius of the orbit ) is evaluated as

r =  R + H

substitute 3.60 * 10^6 m for R and 295.0 * 10^6  \  m H

       r =  295.0 * 10^6   +3.60 * 10^6

=>   r =  2.986 *10^{8} \  m

So

    a_r  =   2.986 *10^{8} *  ( 3.57 *10^{-6} )^2

      a_r  = 3.81 *10^{-3} m/s^2

4 0
3 years ago
Can someone help me figure out which one it is
butalik [34]

Answer:

<h2>X=dt</h2>

.

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.

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.

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7 0
3 years ago
A fireworks shell is accelerated from rest to a velocity of 82.0 m/s over a distance of 0.400 m. (a) How long did the accelerati
KatRina [158]

Find the acceleration:

v² - u² = 2ax

(v = final velocity, u = initial velocity, a = acceleration, x = displacement)

(82.0 m/s)² - 0² = 2 a (0.400 m)

a = (82.0 m/s)² / (2 (0.400 m))

a = 8405 m/s²

Find the time:

x = ut + 1/2 at²

(t = time)

0.400 m = 0 + 1/2 (8405 m/s²) t²

t² = (0.400 m) / (1/2 (8405 m/s²))

t = √((0.400 m) / (1/2 (8405 m/s²)))

t ≈ 0.00976 s

6 0
3 years ago
The force that causes electrons to flow through a conductor is known as:
aniked [119]

Answer:

Voltage

Explanation:

4 0
3 years ago
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