Questions
From the information, what is element X? a.) The wavelength of the radio waves sent by...

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...

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) =...

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

1. When an enzyme runs a chemical reaction, what happens to the enzyme at the end...

1. When an enzyme runs a chemical reaction, what happens to the enzyme at the end of the reaction?
a) it is unchanged, and can run another reaction

b) it is weakened, and is slower the next time

c) it becomes part of the product, and is used up

d) it is permanently damaged, or destroyed



2. When an enzyme accelerates a reaction rate, what does the enzyme do, thermodynamically (energy-wise)?

a)lowers the activation energy for the reaction

b) allows endothermic reactions to go by making them exothermic

c) releases exothermic energy from the reactants

d) generates energy to run the reaction


3. Enzymes have what relationship with their reactants?
a)specific for general type of reaction

b)enzymes can run varied reactions in the cell

c)highly specific for just one reaction

d)can bind several reactants to do similar reactions


4. When you allosterically inhibit an enzyme,

a)you decrease the V max

b)you decrease the Km

c)you increase the V max

d)you increase the Km



In: Biology

A 70 y/o female who had undergone right total hip replacement presents on the 5th postoperative...

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...

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...

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 rod of mass 0.72 kg and radius 0.06 m rests on two parallel rails that...

  1. A rod of mass 0.72 kg and radius 0.06 m rests on two parallel rails that are d = 0.12 m apart and L = 0.45 m long. The rod carries a current of I = 48 A. If it starts from rest, what is the speed of the rod as it leaves the rails if there is a uniform magnetic field of magnitude 0.24 T directed perpendicular to the rod and rails? Answer in units of m/s.

                        a) 23.1 m/s

                        b) 13.1 m/s

c) 15.7 m/s

d) 1.31 m/s

  1. Consider a series RC circuit for which R = 0.9 MΩ, C = 4.5 μF, and V = 28 V. Find the charge on the capacitor 8 s after the switch is closed. Answer in units of μC.

           

A) 118 μC

                 B) 108 μC

                C) 358 μC

                D) 10.8 μC

  1. Two equal charges of magnitude +1 C are separated by a distance of 1 km. What is the force acting between these two charges?

  1. 0.9 N
  2. 9 N
  3. 90 N
  4. 9000 N

In: Physics

The following data represent the 2019 monthly sales in units for the Pacific Region Sales Team...

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...

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