Answer:
Ionic.
Explanation:
To know the the correct answer to the question given above, let us define the terms covalent and ionic.
Covalent is the term used to characterise a compound which is formed by sharing of electrons between the atoms involved. Thus, the compound formed is called covalent compound.
Ionic is the term used to characterise a compound formed when there is a transfer of electron(s) from the metallic atom to the non-metallic atom. The compound formed is called ionic compound.
Considering the question given above, since the calcium atom transfer electron(s) to the carbon atom, it means the compound is an ionic compound.
When object distance is smaller than the focal length of a convex lens, then the rays diverge.
Here, object distance = 20 cm
focal length = 25 cm
20 < 25
Thus, the lens are <u>diverging</u>
<u></u>
<h3>
What is focal length?</h3>
The fundamental description of a camera lens is its focal length, which is often expressed in millimeters (mm). It is not a measurement of the physical length of a lens.
But rather a calculation of the optical distance between the focal plane of the camera's digital sensor or 35mm film to the location where light rays converge to make a sharp image of an object. When a lens is focussed to infinity, its focal length can be calculated.
Learn more about focal length
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Answer: a) 110 *10^-6 m (110 μm); b) 82.86*10^-6 m (82.86 μm).
Explanation: In order to explain this problem we have to consider the expresion for the dark fringes in a difraction pattern for a single narrow slit. It is given by:
a*sin (θ)= m*λ where a is the slit width. θ is the angle corresponding the m dark fringe from the central axis. λ is the wavelength of the incident light.
Then we have m=10 and θ=6° so;
a=10*1152*10^-9/Sin(6°)=110 *10^-6 m
Finally if the whole system is inmmersed in water (n=1.33), we have to add the refractive index in the path difference then: a*n*sin(θ)
a*n*sin (θ)= m*λ then
a= m*λ/(n*sin (θ))=10*1152*10^-9/1.33*Sin(6°)= 82.86* 10^-6 m
Answer:
directly proportional to the square of its speed.
Explanation:
;)
