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Egypt
7. In Brackett's series,the largest wavelength results from the electron transmission between the two levels......... n=5 to n=4 n=4 to n=3 n=∞ to n=4 n=4 to n=5
Physics Mar 29, 2025
14. If the De-Broglie wavelength which associates with the motion of an electron in a certain energy level rzn in a hydrogen atom equals (2πr_n)/4, so the minimum energy that should be acquired by the electron to completely leave the atom equals 0.544 eV 1.51 eV 3.4 eV 0.85 eV
Physics Mar 29, 2025
14. If the De-Broglie wavelength which associates with the motion of an electron in a certain energy level r−n in a hydrogen atom equals ( 2πr−n )/4, so the minimum energy that should be acquired by the electron to completely leave the atom equals 0:544eV 1.51 eV 3.4 eV 0.85 eV
Physics Mar 29, 2025
9. Which of the following is the equation of the oblique asymptote of the curve of equation f(x)=2x3−13x2+17x+12x2−16 ? A. y=−2x−13 B. y=2x−13 C. y=2x+13 D. y=−2x+13 E. None of the above
Calculus Mar 28, 2025
5. 2x−53x=x−1x+1 Using the equation above, find the value of x2. A. -5 B. -1 C. 1 D. 5 E. 5
Algebra Mar 28, 2025
3. Given that i2=−1, and 2i−13i+5+2i−3i−1=a(i−b)i+c, what is the value of a+b+c ? A. 75 B. 16 C. 14 D. 6 E. -16
Algebra Mar 28, 2025
20. A photon of X -rays of (wavelength =7 A∘ ) collides a stationary electron, the energy of the electron after collision is 1.853×10∧(−18)J the wavelength of the photon after collision is...... A∘. 7.46 7.046 8.2
Physics Mar 28, 2025
16 Here are two vectors. BA→=(−54)BC→=(91)
Geometry Mar 28, 2025
(22) tan⁡θ+cot⁡θcsc⁡2θ=Tan2θ+1tan⁡θ×2sin⁡θcos⁡θ  (a) zero  (b) 1sin2⁡θcos2⁡θ+1sin3 (c) 2 (d) cot⁡2θ
Trigonometry Mar 28, 2025
Complete each of the following: A)  Height of a tree is 3.5 m, then  its height in cm=…... B) A jar of capacity 4500ml, then  its capacity in liter is .....  C) 5.7 liter ×…........=5700ml D) 2 and half a day =…..... Hours  Math
Arithmetic Mar 28, 2025
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