Answer: an element; a compound
A compound is a molecule with at least two kinds of atoms. Since iron is only containing Fe then it shouldn't be a compound.
After iron got rust reaction, it will have oxygen make it become iron oxide. The iron oxide having Fe and O so it is a compound.
Answer: The correct answer is "radiometric dating".
Explanation:
Radiometric dating: It is a technique which is used to estimate the age of the rocks. In this technique, there is neither daughter product or parent nuclide can leave or enter the material after its formation.
Radioactive atoms are unstable. It decays into stable daughter atom.
Firstly, measure the quantity of the unstable atoms which are left in rock. Then, compare remaining the quantity of the unstable atoms with the quantity of stable daughter atoms in the rock to calculate the passed time since that rock formed.
Therefore, Scientists have been able to estimate the age of our solar system by radiometric dating.
Answer:
0.05081 kg
Explanation:
= Mass of blood
= 0.435 m/s
= Mass of subject and pallet = 54 kg
= Velocity of subject and pallet = 
In this system the linear momentum is conserved so,
The mass of blood is 0.05081 kg
Solar Radiation, Orbital Distance, Air Pressure, and the Abundance of water.
For an object that is speeding up in the positive direction, its positive displacement is greater every second, and the AMOUNT greater every second is greater than the AMOUNT greater was in the previous second.
So the graph of displacement vs. time is rising as time goes on, and the rise is becoming steeper as time goes on.
The graph is <em>curving upward</em> as time goes on.
