From the information, what is element X?
a.) The wavelength of the radio waves sent by an FM station broadcasting at 97.1 MHz is 30.0 million (3.00 x 10^7) times greater than the wavelength corresponding to the energy difference between a particular excite stateof the hydrogen atom and the ground state.
b.) Let V represent the principle quantum number for the valence shell of element X. If an electron in the hydrogen atom falls from shell V to the inner shell corresponding to the excited state mentioned above in part a, the wavelength of light emitted is the same as the wavelength of an electron moving at a speed of 570 m/s.
c.) The number of unpaired electrons for element X in the ground state is the same as the maximum number of electrons in an atom that can have the quantum number designations n=2, ml= -1, and ms= -1/2.
d.) Let A equal the principle quantum number for the lowest energy excited state for hydrogen. The value of A also represents the angular momentum quantum number for the subshell containing the unpaired electron(s) for element X.
In: Chemistry
A dielectric-filled parallel-plate capacitor has plate area A = 30.0 cm2 , plate separation d= 8.00 mm and dielectric constant k = 4.00. The capacitor is connected to a battery that creates a constant voltage V= 15.0 V . Throughout the problem, use ϵ0 = 8.85×10−12 C2/N⋅m2.
A) Find the energy U1 of the dielectric-filled capacitor.
Express your answer numerically in joules.
B) The dielectric plate is now slowly pulled out of the capacitor, which remains connected to the battery. Find the energy U2 of the capacitor at the moment when the capacitor is half-filled with the dielectric.
Express your answer numerically in joules.
C) The capacitor is now disconnected from the battery, and the dielectric plate is slowly removed the rest of the way out of the capacitor. Find the new energy of the capacitor, U3
Express your answer numerically in joules.
D) In the process of removing the remaining portion of the dielectric from the disconnected capacitor, how much work W is done by the external agent acting on the dielectric?
Express your answer numerically in joules.
In: Physics
The radial wave function for the hydrogen atom in
three dimensions is given by
Rnl(r) = 1
r
ρ
l+1e
−ρ
v(ρ)
where v(ρ) = P∞
j=0 cjρ
j
is a polynomial of degree jmax = n−l−1 in ρ whose
coefficients
are determined by the recursion formula
cj+1 =
2(j + l + 1 − n)
(j + 1)(j + 2l + 2)cj
.
(a) For n = 2 write down the allowed values of ml and jmax.
Hence by using the fact that ρ can be defined in terms
of the Bohr radius a i.e.,
ρ = r/an, show that (don’t normalize)
R20(r) = c0
2a
1 −
r
2a
e
−r/2a
.
Write all spherical harmonics up to l = 2 (there are
nine of them) in Cartesian form,
i.e. give expressions in terms of x, y, z, and r. You can either
use the Rodrigues formula
for the Legendre polynomials or start with the given expressions
for Y
m
l
in terms of θ
and φ. In any event you must show your work.
In: Physics
In: Biology
A 70 y/o female who had undergone right total hip replacement presents on the 5th postoperative day with central chest pain and acute-onset dypsnea. HPI. She has been immobile since the surgery PE. VS: low-grade fever; tachycardia; hypotension. central cyanosis; elevated Jugular venous pressure (JVP); right ventricullar gallop rythm with widely split S2 Labs. Arterial Blood Gas (ABGs); hypoxia and hypercapnia (type 2 respiratory failure). patient had sinus tachycardia on ECG Imaging. Doppler Ultrasound shot clot in the right common femoral vein. CXR, showed right lower lobe atelectasis. V/Q scan demonstrated three areas of ventilation-perfusion mismatch in right lung. Angio-pulmonary: confirmatory; (not rrequired if V/Q scan is high probability). Gross pathology. Large thrombus seen in pulmonary artery Micro pathology. Large occlusive thrombus seen in pulmonary artery with variable degree of recanalization. 3) Design a long term care protocol to adress this patient situation.
In: Nursing
A 70 y/o female who had undergone right total hip replacement presents on the 5th postoperative day with central chest pain and acute-onset dypsnea. HPI. She has been immobile since the surgery PE. VS: low-grade fever; tachycardia; hypotension. central cyanosis; elevated Jugular venous pressure (JVP); right ventricullar gallop rythm with widely split S2 Labs. Arterial Blood Gas (ABGs); hypoxia and hypercapnia (type 2 respiratory failure). patient had sinus tachycardia on ECG Imaging. Doppler Ultrasound shot clot in the right common femoral vein. CXR, showed right lower lobe atelectasis. V/Q scan demonstrated three areas of ventilation-perfusion mismatch in right lung. Angio-pulmonary: confirmatory; (not rrequired if V/Q scan is high probability). Gross pathology. Large thrombus seen in pulmonary artery Micro pathology. Large occlusive thrombus seen in pulmonary artery with variable degree of recanalization. 2) Design a short term nursing protocol
In: Nursing
his animation shows a coaxial capacitor with cylindrical geometry: a very long cylinder (extending into and out of the page) in the center surrounded by a very long cylindrical shell (position is given in centimeters, electric field strength is given in newtons/coulomb, and electric potential is given in volts). The outside shell is grounded, while the inside shell is at 10 V. You can click-drag to measure the voltage at any position
a cylindrical coaxial capacitor of length L is E = Q/2πrLε0 = 2kQ/(rL), where Q is the total charge on the inside (or outside) conductor and r is the distance from the center.
1. Given, then, that the potential difference between the two conductors is V = (Q/2πLε0) ln(b/a) = (2Qk/L) ln(b/a), (b is the radius of the outer shell and a is the radius of the inner cylinder) show that the capacitance of this capacitor is (2πLε0)/ ln(b/a) = (L/2k)*(1/ ln(b/a)). i. This is a capacitance for a given length L. ii. You should also consider some limiting cases here and discuss. What happens as b approaches a? And what happens as b>>a?
In: Physics
a) 23.1 m/s
b) 13.1 m/s
c) 15.7 m/s
d) 1.31 m/s
A) 118 μC
B) 108 μC
C) 358 μC
D) 10.8 μC
In: Physics
The following data represent the 2019 monthly sales in units for the Pacific Region Sales Team of QualCase, Inc.
|
Month |
Units sold (xi) |
(x – x-bar) |
Squared values |
Divide total by n-1 |
SQRT |
|
Jan |
73 |
| |
| |
||
|
Feb |
79 |
| |
| |
||
|
Mar |
76 |
| |
| |
||
|
Apr |
79 |
| |
| |
||
|
May |
80 |
| |
| |
||
|
Jun |
78 |
| |
| |
||
|
Jul |
77 |
| |
| |
||
|
Aug |
78 |
| |
| |
||
|
Sep |
75 |
| |
| |
||
|
Oct |
72 |
| |
| |
||
|
Nov |
75 |
| |
| |
||
|
Dec |
82 |
V |
V |
||
|
TOTAL => |
TOTAL => |
||||
|
n = |
|||||
|
x-bar = |
PROBLEM #1: Use the table above and the procedures learned in class to calculate the standard deviation (notated as s) of average monthly sales. What is the standard deviation of average monthly sales?
PROBLEM #2: Apply the results of your answer to Problem #1 and use the table below and the procedures learned in class to calculate the 95% confidence interval for average monthly sales in units. What is the 95% confidence interval (CI) for average monthly sales?
|
SE of mean |
|
|
z-value |
1.96 |
|
Plus/minus value |
|
|
Upper CI value |
|
|
Lower CI value |
In: Finance
Please answer with a full solution. Thanks!
A Baseball is hit when it is 2.7 feet above the ground. It leaves the bat with n initial speed of 150 ft/sec making an angle of 18 ∘ with the horizontal. Assume a drag coefficient k=6.12. find the range and the flight time of the ball For projection with linear drag x = x 0 + v 0 k ( 1 − e − k t ) c o s α y = y 0 + v 0 k ( 1 − e − k t ) s i n α + 8 k ( 1 − k t − e − k t ) Where k is the drag coefficient and v_0 and \alpha are the projectiles initial speed and the lauch angle, and g is the acceleration of the gravity (32ft/sec^2) a. Flight time=2.93 sec; range=351.6 feet b. Flight time=2.81 sec; range=340.3 feet c. Flight time=3.16 sec; range=362.5 feet d. Flight time=2.01 sec; range=331.6 feet
In: Physics