3 years ago

Describe how urine is removed from the blood and then eliminated from the body

1 answer:

7 0

Passes through the kidneys and the good stuff is kept, and the other stuff is passed through leading to the bladder. The once the bladder is full enough to send the message to the brain, urine (waste) is eliminated from the body.

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Answer:

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2 years ago

If electromagnetic radiation has a frequency of 2.0×1015s−1, what is the radiation’s energy?(1 point)

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Frequency=v=2×10^15Hz
Energy=E

Using planks quantum theory

$\\ \sf\longmapsto E=hv$

$\\ \sf\longmapsto E=6.626\times 10^{-34}Js\times 2\times 10^{15}s^{-1}$

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3 years ago

If the half-life of Carbon-14 is 5700 years, how many years would it take a sample to decay from 1 gram to 31.3 mg

andrew-mc [135]

Answer:

28500 years

Explanation:

Applying,

A = A'( $2^{x/y}$ )............... Equation 1

Where A = Original mass of Carbon-14, A' = Final mass of carbon-14 after decaying, x = total time, y = half-life.

From the question,

Given: A = 1 g, A' = 31.3 mg = 0.0313 g, y = 5700 years.

Substitute these values into equation 1

1 = 0.0313( $2^{x/5700}$ )

$2^{x/5700}$ = 1/0.0313

$2^{x/5700}$ = 31.95

$2^{x/5700}$ ≈ 32

$2^{x/5700}$ ≈ 2⁵

Equating the base and solve for x

x/5700 ≈ 5

x ≈ 5×5700

x ≈ 28500 years

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2 years ago