A 3.90L sample of gas at STP is cooled to -55oC at 808mmHg. What is the new volume?
Answers
Answer:
3.72L
Explanation:
Given parameters:
Initial volume V₁ = 3.9L
Condition = STP
Final temperature T₂ = -550°C
Final pressure P₂ = 880mmHg
Unknown:
Final volume V₂ = ?
Solution.
At standard temperature and pressure(STP), the:
Pressure = 1atm = 760mmHg
Temperature = 273K
Therefore, P₁ = 760mmHg
T₁ = 273K
The general gas law, is best to solve this problem. It is mathematically given as:
Let us take the units to the appropriate one;
-550°C = 273 + (-550) = -277K
Input the variables;
V₂ = 3.72L
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When copper is hammered into a sheet what type of change has the matter gone through?
Answers
The gravitational potential energy not only depends on the mass of the substance but also on the height it positioned. Hence, two objects with same mass does not have same potential energy if they are not in same height.
What is gravitational potential energy?
Gravitational potential energy of an object is the energy generated by virtue of its position in gravitational field. Gravitational force is exerted by one object by which it attracts other objects into its centre of mass.
The gravitational force is dependant upon the mass of the object as well to the distance between the objects. Similarly the potential energy p is proportional to the mass m, gravity g and the height from the surface h.
Hence p = mgh.
As per this relation potential energy is not only affected by the mass but also the height at which the objects are located.
If an object is placed at a height higher than other object having same mass then it stores greater potential energy. Hence, we can't agree with the statement .
To find more on potential energy refer here:
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Answer:
the above screenshot has the answers
Answers
b) 0.59
c) 2.31
d) 3.92
Answers
Answer: option B. 0.59
Explanation:Please see attachment for explanation
What is the total amount of energy from before the conversions to after the conversions?
45 Joules because some energy is lost when it is put off as heat.
100 Joules because you start with one form of energy and end up with two forms, so the amount of energy doubles.
50 Joules because as energy converts from one form to another, it cannot be created or destroyed during the conversion.
55 Joules because as more electricity comes in to the light bulb, the Joules increase.
Answers
When energy is converted there will always be less after the conversion than before, because of the thermal energy loss. Just like it is easier to push something if it is on ice than if it is on grass. That is because there is less friction on the ice to convert some of the energy into thermal energy (or heat)
I hope this helped!! :)
The correct answer is 50 Joules because as energy converts from one form to another, it cannot be created or destroyed during the conversion
Answers
Answer:
Dark matter also called baronic matter is the matter that makes up 27% of the universe.
In 1933 it was determined as that mass that cannot be seen, that is, the non-visible mass of outer space.
Dark matter also plays a central role in the formation of structures and the evolution of galaxies and has measurable effects on the anisotropy of cosmic microwave background radiation. The composition of this matter is unknown today.
The dark matter component has considerably more mass than the "visible" component of the Universe.
Explanation:
There are certain researchers who say that the appearance of dark matter was before the appearance of the big bang.
A relevant fact of this matter is that dark matter exerts gravity, and that gravity affects the movements of objects.
Despite the fact that nothing is known about its origin, astronomers have amply demonstrated that dark matter plays a determining role in the formation of galaxies and galactic clusters, which could not maintain their cohesion without its existence, but many doubt that it is the remainder / remnant or product of a big bang.