Explanation :
When an electron jumps from one energy level to another, the energy of atom gets changed.
If a photon gets absorbed, the electron will move to higher energy levels and then fall back to the lower energy levels. Then each time a photon will be absorbed whose energy is given by difference between the initial and final energy levels i.e
In Balmer series, the transition is from higher energy levels to n = 2.
So, the necessary condition for Balmer series is that the electron should be at first excited state or n = 2 level as shown in figure.
Answer:
troposphere and stratosphere
Answer:
Radius of cross section, r = 0.24 m
Explanation:
It is given that,
Number of turns, N = 180
Change in magnetic field, 
Current, I = 6 A
Resistance of the solenoid, R = 17 ohms
We need to find the radius of the solenoid (r). We know that emf is given by :
Since, E = IR
or
Area of circular cross section is, 
r = 0.24 m
So, the radius of a tightly wound solenoid of circular cross-section is 0.24 meters. Hence, this is the required solution.
Answer:
child-directed speech
Explanation:
child-directed speech is Any of various speech patterns used by parents or caregivers when communicating with young children
Answer:
N = 3600 N
Explanation:
centripetal acceleration requirement is
ac = v²/r = 20²/50 = 8 m/s²
As the only available acceleration is gravity, centripetal acceleration must come from that,
This makes the "weight" that the road senses and must counteract
N = m(g - ac)
N = 2000(9.8 - 8)
N = 3600 N
