That's false. If it had only magnitude it would be speed. Velocity also has Direction.
Answer:
Explanation:
1- incident ray
2- the substance through which the wave travels
Explanation:
The lines in the spectra of star is due to absorption of light emitted by star by different elements present in atmosphere of the star .
If some element is present in the outer atmosphere of he star , it will absorb a particular portion of light , for which there will be black line in the spectrum .
These are called Fraunhoffer's lines .
Now there is no such line at the place of Helium in the light spectrum . This means that Helium element is not present in the outer atmosphere of the star.
We could determine the acceleration using this formula
Given from the question v₀ = 23 m/s, v₁ = 0 (the car stops), t = 5 s
plug in the numbers
a = -4.6
The acceleration is -4.6 m/s²
Answer:
True
Explanation:
A wave is generated as a result of oscillations which creates disturbances in the medium and these disturbances termed as waves propagates or travels from one point to another.
Waves can be classifies as:
Mechanical waves which requires material medium for their propagation
Electromagnetic waves which do not require any material medium to propagate.
A wave travels at a specific velocity depending on the type of the medium in which it propagates.
