Answer:
The objects kinetic energy increases as it falls from some height.
For the first one, the correct answer would be "<span>Substance changes its form but not its molecular composition.". During a physical change (let's say cutting paper), the substance has its shape changed, but it is still itself (paper).
</span><span>The second one is a bit trickier: </span>
Kinetic energy of a molecule is directly influenced by temperature. If there is a higher temperature it will have a higher kinetic energy which means the molecule moves at a higher velocity. This will increase the chance of particles bouncing off of each other during the chemical reaction. That explains why the rate of reaction will be higher at a higher temperature, rather than higher at a cool temperature. The correct answer would be lower at 39F.
1 - Radius of the path is increased
The formula for centripetal force is Fc=mv^2/r, therefore if r increases, a the divisor is larger and hence the centripetal force will be smaller.
Spectroscopy is the study of the absorption and emission of light and other radiation by matter.
<h3>How can we conclude the statement?</h3>
Spectroscopy is the interaction of lights and atoms and the study of the emission and absorption of light.
Spectroscopy can be defined as the study of light absorption as well as its emission. It is also uses to study of structure of atoms.
It offers techniques that has to do with how a sample responds to the radiation of light.
Its applications are:
- Used to determine atomic structure To determine metabolic functions
- studies spectral emissions
- Helps to improve the effectiveness of drugs
Learn more about Spectroscopy:
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Answer:
3.33 m/s to the right
Explanation:
Momentum is conserved, so you have ...
(m1·v1) +(m2·v2) = (m1+m2)v
v = (m1·v1 +m2·v2)/(m1+m2)
= ((100 kg)(10 m/s) +(200 kg)(0 m/s))/(100 kg +200 kg)
= (1/3)(10 m/s) ≈ 3.33 m/s
The final velocity is about 3.33 m/s to the right.
