If there are 50 grams of U-238 on day zero of radioactive decay, how much will there be after 4.5 billion years

Answers

Answer 1

Answer: We use the formula of the half-life to calculate for the remaining U-238 after 4.5 billion years. The formula is expressed as A = A₀ (1/2)^(t/h) where A is the final amount, A₀ is the initial amount of the substance, t is the time and h is the half-life of the substance wherein for U-238 h is equal to 4.47 billion years.

A = A₀ (1/2)^(t/h)
A = 50 (1/2)^(4.5 / 4.47)
A = 24.88 g

Answer 2

Answer:

25 if using usatsyprep

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Which of the following statements is not true regarding atmospheric pressure?A. You calculate absolute pressure by adding atmospheric pressure to gage pressure.
B. When atmospheric pressure is higher than the absolute pressure of a gas in a container, a partial vacuum exists in the container
C. Mercury and aneroid barometers are used to measure atmospheric pressure.
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Answers

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Gravity is affected by

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Gravity is affected by mass and distance

How much energy is contained in matter with mass of 1 gram (0.001 kilogram)

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The mechanical energy consisting of potential and kinetic energy is:

0.001 x [ (acceleration of gravity x height) + (1/2) (speed)² ] .

You want to know how much [ mc² ] there is in 1 gram of mass.

E = m c² = (0.001) x (3 x 10⁸)² = 9 x 10¹³ joules

That's the energy that a 1,000-watt toaster uses
in 2,852 years of continuous toasting.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Hope that helped!

If an electric charge is accumulated on an object, it is referred to as _____

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Static, because it stays on the object.

It is referred as Static Electricity.

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