Explanation:
Matter in which molecules have strong force of attraction are held tight together. Therefore, to break this force of attraction strong force is required.
This type of matter is know as solid. Also, it is known that solid substances have definite shape and volume.
Thus, we can conclude that a substance with a definite shape and volume is a solid phase of matter.
When you have a fever, the average kinetic energy of the water molecules in your body increases because the molecule's speed increases.
To learn more kinetic energy, refer to:
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B) It attempts to explain why things happen.
C) It describes what happens in the world around us.
D) It must be supported by many independent scientific investigations.
2)Observation and experimentation have led many scientists to accept a theory about the origin of the universe. This theory is called the Big Bang Theory. Scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. What makes this a scientific theory?
A)It has been proven by several scientists independently, resulting in its being accepted as truth.
B)It is based on the beliefs and opinions of the majority of the scientific community.
C)It is an observation of the natural world that has been proven as fact.
D)It is the best explanation that scientists can offer, based on many scientific investigations.
3)A scientist in Italy published his findings from a scientific investigation that he conducted. Other scientists from around the world conducted similar investigations to test the results. All of the investigations result in similar findings. What does this say about the findings of these investigations?
A)They have been proven to be scientific fact because all the investigations gave similar findings.
B)The findings are automatically promoted to a law because they were proven by so many scientists.
C)They are ready to be published in the media and in text books as a new scientific theory.
D)The results are considered more reliable because they were documented by separate investigations.
4)Which of the following is not an example of kinetic energy?
A)mechanical energy
B)nuclear energy
C)electrical energy
D)thermal energy
A) It must be verified by scientists around the world.
A scientific law is a way to describe a phenomenon that occurs in our universe. In order for a research to become law, it must be accepcted by the vast majority - if not all - of the scientists in the same field. However, they do not have to verify the potential law, they can choose to falsify or just to accept proofs taken by the discovers.
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A)It has been proven by several scientists independently, resulting in its being accepted as truth.
The Big bang is a scientific theory that explain how our universe was born. Before becoming a theory and becoming the "fact" we assume it is, it was long subject of study, and it was accepted only when different study from different scientists pointed out in the same direction. Hoever, ever today, study continues to have a better understanding of the phenomenon.
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D)The results are considered more reliable because they were documented by separate investigations.
When different experiments are made, and they gave out similar results, the results become more reliable, as they are been proven by different sources in an indipendent way. However, this do not imply a pubblication or the trasformation of the results into a scientific law, as those steps go through a different process.
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B)nuclear energy
C)electrical energy
D)thermal energy
Only mechanical energy is a type of kinetic energy. Kinetic energy means an energy that derives from a movement. Nuclear energy, electrical energy and thermal energy are other forms of energy. Energy from one of these sources could be converted into kinetic energy, or kinetic energy could be used to generate other forms of energy.
true or false?
Answer:
true
Explanation:
they are the building part of all thing
Given:
128g sample of titanium
2808J of heat energy
specific heat of titanium is 0.523 J/ g °C.
Required:
Change in temperature
Solution:
This can be solved through the equation H = mCpT where H is the heat, m is the mass, Cp is the specific heat and T is the change in temperature.
Plugging in the values into the equation
H = mCpT
2808J = (128g) (0.523 J /g °C) T
T = 41.9 °C
Answer is: scientists use different types of model to show different characteristics (chemical properties) of compound.
For example, ball and stick model gives informations about bond lenght and space filling model gives information about space occupied by atoms.
In chemistry, the ball-and-stick model is a molecular model of a chemical substance which is to display both the three-dimensional position of the atoms and the bonds between them. The atoms are represented by spheres, connected by rods which represent the bonds. Every ball represent one atom in one molecule and they have different colors for different atoms (for example, carbon is black, hydrogen is white, nitrogen is blue).
There also other models: skeletal models, polyhedral models, composite models, computer-based models.
(2) A bond is broken and energy is released
(3) A bond is formed and energy is absorbed
(4) A bond is formed and energy is released