Answer:
It is experimental. She will testing or investigating on children. So yeah, it is experimental
Answer:
Explanation:
Myopia is the defect of human eye in which a person is not able to see the far off objects clearly but can see the nearby objects clearly.
It is due to the increase in focal length of the eye lens and the contraction in the size of eye ball.
It is cured by using the concave lens of suitable focal length.
Hello!
Your answer is all of the above. Science is a very broad field, and it is the thing which has engineered most, if not all, of our technology today. Take for example microwave ovens. These could not have been possible without science, as it was science that realized that "microwaves" (a type of wave length) even existed.
Hope this helps!
Answer:
A magnetic field caused by electric current.
Explanation:
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of wire wound into a coil. A current through the wire creates a magnetic field which is concentrated in the hole, denoting the centre of the coil.
Reference.
Nave, Carl R. (2012). "Electromagnet". Hyperphysics. Dept. of Physics and Astronomy, Georgia State Univ. Archived from the original on September 22, 2014. Retrieved September 17, 2014.
Use Doppler's formula to find the radial velocity of star.
Here,
= Radial Velocity
c = Speed of light
= Shift in wavelength
= Laboratory wavelength of spectral line
Rearrange for ,
Find shift in wavelength,
Replacing our values we have then,
Therefore the radial velocity of star is 
m/s
In this case the symbol of implies that the star is receding the observer and the wavelength turns to red, then is red shifted.
