when an object moves with constant velocity, does its average velocity during any time interval differ from its instataneous vel
1 answer:
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Answer:
D. 160 nm
Explanation:
The energy released from n = 3 to n = 1 must be equal to the sum of energies released from n = 3 to n = 2 and from n = 2 to n = 1. Therefore,
Energy of Photon from 3 to 1 = Energy of Photon from 3 to 2 + Energy of Photon from 2 to 1
where,
λ = wavelength of photon released from 3 to 1 = ?
λ₁ = wavelength of photon released from 3 to 2 = 800 nm
λ₂ = wavelength of photon released from 2 to 1 = 200 nm
Therefore,
Therefore, the correct option is:
<u>D. 160 nm</u>
The cliff is 12.71m tall.
Why?
Before solving the problem, we must remember that the phone was dropped, it means that there is no initial velocity, also, the acceleration acting on the phone is the acceleration due to gravity.
So, to find how tall is the cliff, we can use the following equations:
Now that we know the time, we can calculate how tall is the cliff:
Hence, we have that the cliff is 12.71m tall.
Have a nice day!