Answer:
a) 10.2 eV
b) 122 nm
Explanation:
a) First we must obtain the energy for each of the states, which is given by the following formula:
So, we have:
Now we find the energy that the electron loses when it falls from state 2 to state 1, this is the energy carried away by the emitted photon.
b) Using the Planck – Einstein relation, we can calculate the wavelength of the photon:
Where E is the photon energy, h the Planck constant and the frequency.
Recall that , Rewriting for :
Recall that , So:
Answer:
The ratio of the power generated by the engines are
(b) is correct option.
Explanation:
Given that,
Mass of Tesla = 2000 Kg
Torque = 400 Nm
Mass of Mercedes = 1.5 M Tesla
The Benz engine produces 50% more torque than the Tesla.
We need to calculate the power generated by the engines 6 seconds after a start from rest
Using formula of power
We know that,
Put the value of F and v in equation (I)
Here, r and t are same for both bodies.
We need to calculate the ratio of the power generated by the engines
Using formula of power
Put the value into the formula
Hence, The ratio of the power generated by the engines are
Answer: i would do something that is really easy and i will do test 2 where there aint a word problems and i am going 2 put the work 2 where it is 2 there standard i aint going 2 do sum over there standards of science.
Explanation:
Answer:
(a)
(b) 4.17 rev
(c) 6.40 sec
Explanation:
We have given the angular velocity of fan decreases from 550 rev/min to 180 rev/min
So initial angular speed
Final angular speed
Time is given as t = 4.3 sec
(a) We know that angular acceleration is given by
(b) We know the relation \Theta =\omega _0t+\frac{1}{2}\alpha t^2=9.166\times 4.3-\frac{1}{2}\times 1.43\times 4.3^2=26.1935rad=\frac{26.1935}{2\pi }=4.17rev
(c) Now final angular velocity
So time