If there are 50 grams of U-238 on day zero of radioactive decay, how much will there be after 4.5 billion years? A) 0.0 grams B) 10 grams C) 25 grams D) 50 grams
Answers
Answer:
= 25 g
Explanation:
Using the formula;
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,
In this case; the half life of U-238 h is equal to 4.47 billion years.
A = A₀ (1/2)^(t/h)
A = 50 (1/2)^(4.5 / 4.47)
= 24.88
= 25 g
Answer:
C) 25 grams
Explanation:
25 grams would remain after one half-life (4.5 billion years). Find the point where percent remaining is 50% and that will tell you it is one half-life.
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Based on the calculations, a molecule travels 22.73 as fast as a car.
Given the following data:
- Speed of car = 50 mph (22 m/s)
Under standard temperature and pressure (room conditions), the speed of an average molecule is equal to 500 meter per seconds. Thus, the speed of air particle is 500 m/s.
To determine how fast (rate) the air particles in a room are moving compared to a car, we would use this formula:
Substituting the given parameters into the formula, we have;
Rate = 22.73
Read more on speed here: brainly.com/question/10545161
The average molecule of air is moving at speed of 500 m /s and thus
speed of air particle = 500 m /s
speed of car = 22 m /s
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2.5
1.25
0.78
0.39
Answers
Answer:
0.78
Explanation:
Source: Just took the Test
Answers
Answer:
angiosperm
Explanation:
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The answer option which lists celestial bodies in order, from closest to furthest from the Earth is: A) moon, sun, near edge of milky way, center of milky way.
A planet can be defined as a large celestial body that has sufficient mass to allow for self-gravity and make it assume a nearly circular shape (hydrostatic equilibrium).
Basically, a planet revolves in an orbit around the Sun in the solar system and has a cleared neighborhood.
In Science, planets are broadly grouped into two (2) main types and these are;
I. Inner planets: these planets are closest to the Sun and comprises Mars, Mercury, Venus, and Earth.
II. Outer planets: these planets are mainly located beyond the asteroid belt and includes Uranus, Jupiter, Neptune, and Saturn, from left to right of the solar system.
On the other hand, a list of the celestial bodies in order, from closest to furthest from planet Earth are:
- Moon: its distance from planet Earth is about 405,696 kilometers.
- Sun: its distance from planet Earth is about 149,597,870 kilometers.
- Near edge of milky way: its distance from planet Earth is about 1,000,000,000,000,000,000 kilometers.
- Center of milky way: is the farthest from planet Earth.
Read more: brainly.com/question/15234643
The moon is right next to Earth.
Earth orbits around the sun.
Our solar system is at the edge of the Milky Way. So the edge of the Milky Way would be nearer than the center.