Answer:
Observations:
- Large scale structures look about the same in all directions.
- The temperatures of the cosmic microwave background varies slightly with direction.
- The cosmic microwave background temperature is approximately 2.73 Kelvin.
- The Helium abundance is at least 25% in every galaxy studied so far.
While Inference includes:
- Photons of the cosmic microwave background is radiation left over from the Big bang.
- The cosmic microwave background is radiation left over from the Big bang.
- Fusion during the universe's first five minutes produced 75% hydrogen and 25% helium.
- Large-scale structure grew around density variations present in the early universe.
Explanation:
Inference here refers to the process of drawing a conclusion based on what is already known while Observation involves the perception and recording of data via the use of scientific instruments and procedures.
The insights below highlights the explanations for some of the insights used in determining its Observation or Inference status.
The Cosmic Microwave Background, which contains the afterglow of light and radiation is left over from the Big bang.
The Cosmic Microwave Background is black body radiation at a temperature of 2.725 Kelvin.
In the year 1965, a pair of radio astronomers named Arno Penzias and Bob Wilson respectively were working at Bell labs, in New Jersey. Using an antenna that is sensitive to the radiation of microwaves, they discovered an unknown source of static noise. After they tried doing everything possible to reduce the noise, they realized that the microwaves had a black body spectrum, with a characteristic temperature of only T = 2.725 Kelvin ( and maximum wavelength of 1 millimeter). These ever present microwaves seen in every direction are called "Cosmic Microwave Background". This explains the reason behind statement five(5) being an Observation.
Finally, The Cosmos Background Explorer (COBE) which launched a satellite in the year 1989 found that there were slight fluctuations in the radiation spectrum. The temperature varies very slightly from one place to another by a few parts in 100,000 i.e (10^-5). The excerpts above clarify the reason for the answer to statement four(4) being listed as an Observation.
Answer:
N
Explanation:
We are given that three charged particle are placed at each corner of equilateral triangle.




Side of equilateral triangle =3.3 cm=
We know that each angle of equilateral angle=
Net force=F =
Where k=
If we bisect the angle at
then we have 30 degrees from there to either charge.
Direction of vertical force due to charge
and 
Therefore, force will be added
Vertical force=
Vertical net force=
Vertical force =
Vertical force=
(towards 
Horizontal component are opposite in direction then will b subtracted
Horizontal force=
Horizontal force=
N(towards 
Net electric force acting on particle 3 due to particle =
Net force=
Net force=
N
Answer:
Height of the building = 11.4 m
Explanation:
As we know that the stone is projected at an angle 46 degree with speed 8.65 m/s
so the two components of the speed is given as


vertical component of the speed is given as


now we know that the ball strike at horizontal distance of 13.7 m
so we will have



now we know that in vertical direction ball will move under uniform gravity so we can use kinematics



Height of the building = 11.4 m
Metals are good conductors because the molecules that are inside the metal are tightly packed together. This is why the heat moves through the metal quickly.
Answer:
The magnitude of force is 
Solution:
As per the question:
The strength of Electric field due west at a certain point, 
Charge, Q = - 6 C
Now, the force acting on the charge Q in the electric field is given by:


Here, the negative sign indicates that the force acting is opposite in direction.