Here in this type of question we can use momentum conservation
It is because we can see there is no external force on the system
So we can use momentum conservation principle
here we know that
now after bird sits on it then final speed of the both will be same
so final speed will be 1 m/s
Answer:
The correct option is a behavioural models of the the to-be system.
Explanation:
As the Use case analysis method generates the analysis classes list such that the classes are capable of performing the behavior needed to make the system function successfully. From these analysis classes list the responsibilities of each class are defined.
As the list is derived from the behavioural models of the system, thus option a is the correct option.
Loud sounds ... d) willl be answer
Answer: i wasted one of your answer that sad srry
Explanation:
Answer:
The energy levels are: 3s and 3p
Explanation:
<u>The sodium (Na) element, with atomic number 11 (number of protons: Z=11), has the next electronic configuration</u>:
Z=11: 1s² 2s² 2p⁶ 3s¹ = [Ne] 3s¹
<u>Hence, the electricity used in a sodium vapor lamp will</u> excite the electron of the energy state n=3 from the s-orbital to the next highest energy p-orbital <u>which then</u> drops back to the lower energy s-orbital by the emission of a photon <u>resulting in the production of light</u>.
<u />
<u>The transition of the electron is</u>:
Excitation: [Ne] 3s¹ → [Ne] 3s⁰ 3p¹
Emission: [Ne] 3p¹ → [Ne] 3s¹
So, the energy levels that are involved in the process are 3s and 3p.
Have a nice day!
