Answer:
A) are called "true" bacteria
If a 3.0 picogram (pg) sample of curium-245 has a half-life of 8500 years, which conclusion can be drawn?
A: The curium-245 sample must have an age of at least 8500 years.
B: The curium-245 sample must have an age of less than 8500 years.
C: The curium-245 sample will have a mass of about 6.0 pg after 8500 years.
D: The curium-245 sample will have a mass of about 1.5 pg after 8500 years.
Answer:
its A
Explanation:
If a 3.0 (pg) sample of curium-245 has a half-life of 8500 years, then the conclusion which can be drawn is the curium-245 sample will have a mass of about 1.5 pg after 8500 years
What is half life time?Half life time is that time after which initial concentration of reactant becomes half of the initial.
Given that initial concentration of curium-245 = 3pg
After half life time concentration of curium-245 = 1.5pg
The curium-245 sample must have an age of at least 8500 years is wrong as given time is the half life time.The curium-245 sample must have an age of less than 8500 years is wrong as given time is the half life time.The curium-245 sample will have a mass of about 6.0 pg after 8500 years is alo wrong as left sample shold be half of the initial.Hence, the curium-245 sample will have a mass of about 1.5 pg after 8500 years is the conclusion.
To know more about half life time, visit the below link:
https://brainly.com/question/2320811
#SPJ2
what are the first 3 rules that Newton made??
Answer:
Newton's Laws of Motion
Explanation:
1st- Inertia- every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.
2nd- The second law states that the greater the mass of an object, the more force it will take to accelerate the object
3rd- action reaction- If the forces are equal in opposite directions, the object will not move. The forces cancel each other out so that the acceleration is zero. If one force acting in one direction is greater than the force acting in the opposite direction, the object will move.
PLS HELP THIS IS ACTUALLY SCIENCE BUT PLS HELP
What is the greenhouse effect?
Answer:
the greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. ... The absorbed energy warms the atmosphere and the surface of the Earth.
GIVING BRAINLIEST FIVE STARS AND HEART!
In your own words explain the difference between potential energy and kinetic energy. Give an example of how one can be transformed into the other.
Explanation:
When an object is at rest, the body is said to possess potential energy. In another case, when the object is in motion, then it is said to possess kinetic energy. Potential energy tends to affect the object within the environment if and only when it gets transformed to other kinds of energy.
Is this a chemical reaction or not? Explain why you think so (Be sure to answer both parts of the question)
Answer:
1. No 2. Yes 3. Yes
Explanation:
One is a physically. The other deals with an not reversible change