Explanation:
Effective nuclear charge is defined as he net positive charge experienced by an electron in an atom. It is termed "effective" because the shielding effect of electrons prevents higher orbital electrons from experiencing the full nuclear charge of the nucleus due to the repelling effect of inner-layer electrons.
The 1s is the closest shell to the nucleus of an therefore maximum nuclear charge is experienced. The formula for effective nuclear charge is:
Zeff = Z – S
where
Z = the number of protons in the nucleus, and
S = the shielding constant, the average number of electrons between the nucleus and the electron.
Hence, the energy required to remove an electron from the 1s orbital is the strongest.
Explanation:
direction of electric field is same as that of force experienced by the test charge
Answer:
2352645198509.9604 m/s²
Explanation:
G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²
M = Mass of black hole = 
= 10000+100 m
= Distance between the nose and the center of the black hole = 10000 m
The difference in the gravitational field in this system is given by
The acceleration is 2352645198509.9604 m/s²
Answer:
option A
Explanation:
the correct answer is option A
when the air temperature increases the relative humidity decreases.
When temperature increase the ability to hold water vapor decreases.
higher the water vapor more will be the amount of moisture content.
it take less water vapor to saturate air in a city with low temperature compared with high air temperature.
Answer:
Energy, 
Explanation:
It is given that,
The MRI (Magnetic Resonance Imaging) body scanners used in hospitals operate at a frequency of 400 MHz,
We need to find the energy for a photon having this frequency. The energy of a photon is given by :
So, the energy of the photon is 
. Hence, this is the required solution.
