Answer:
Work Function = 3.53 x 10⁻¹⁹ J = 2.2 eV
Explanation:
The work function of the metal metal can be found as follows:
Energy of Photon = Work Function + K.E
hc/λ = Work Function + K.E
Work Function = hc/λ - K.E
where,
h = Plank's Constant = 6.625 x 10⁻³⁴ J.s
c = speed of light = 3 x 10⁸ m/s
λ = wavelength of photons = 240 nm = 2.4 x 10⁻⁷ m
K.E = Maximum Kinetic Energy = (2.97 eV)(1.6 x 10⁻¹⁹ J/1 eV) = 4.752 x 10⁻¹⁹ J
Therefore,
Work Function = (6.625 x 10⁻³⁴ J.s)(3 x 10⁸ m/s)/(2.4 x 10⁻⁷ m) - 4.752 x 10⁻¹⁹ J
Work Function = 8.281 x 10⁻¹⁹ J - 4.752 x 10⁻¹⁹ J
<u>Work Function = 3.53 x 10⁻¹⁹ J = 2.2 eV</u>
Answer: B
Explanation: Hemoglobin is a protein in red blood cells that acts as the vehicle for oxygen and carbon dioxide from the lungs to tissues and vice-versa.
What is considered normal Hemoglobin levels vary throughout one's life, from childhood to adult life and in older adults. It even varies between women and men. In women, it also varies depending on whether they are pregnant or not.
When hemoglobin does become less than normal, it results in anemia, a condition accompanied by fatigue. Because the athlete does not have this symptom, he is not suffering from anemia, and so there is no cause for concern. Although the athlete's hemoglobin level has reduced, the absence of fatigue indicates that it is not lower than normal.
Answer:
The velocity is 
The pressure is 
Explanation:
From the question we are told that
The speed at which water is travelling through is 
The pressure is 
The diameter of the new pipe is 
Where D is the diameter of first pipe
According to the principal of continuity we have that
Now 
is the area of the first pipe which is mathematically represented as
and 
is the area of the second pipe which is mathematically represented as
Recall
![A_2 = \pi \frac{[ D^2]}{4 *4}](https://tex.z-dn.net/?f=A_2%20%3D%20%5Cpi%20%20%5Cfrac%7B%5B%20D%5E2%5D%7D%7B4%20%2A4%7D)
So 
substituting value
According to Bernoulli's equation we have that
substituting values
Each element has the same number of electrons and protons. Electrons are negatively charged, and protons are positively charged.
