Reference no: EM13963675
1. A 100-keV x ray is Compton-scattered through an angle of 90 degrees. What is the energy of the x ray after scattering?
a. 83.6 keV
b. 121 keV
c. 114.5 keV
d. 100 keV
2. What is the de Broglie wavelength of a particle moving at a speed of 1.00 x 10^6 m/s if it is (a) an electron (b) a proton? (me= 9.11 x 10^-31 kg and mp=1.67x^-27 kg.)
a. 0.727 nm and .000397 nm
b. 7.27 nm and 39.7 nm
c. 1.25 nm and .00452 nm
d. 72.7 nm and .0389 nm
3. A slowly moving electron is localized to be within 0.50mm of a particular point. What is the minimum uncertainty ith which its velocity can be simultaneously determined?
a. 23 m/s
b. 0.23 m/s
c. 46 m/s
d. 4500 m/s
4. In radiating a photon of green light (l = 546 nm), an atom radiates for 1.00 x 10^-9 s. (a) What is the energy of the photon? (b) What is the uncertainty in its energy?
a. 2.27 eV and 0.659 micro. eV
b. 8.42 eV and .01 eV
c. 1.86 eV and .42 micro. eV
d. 5.33 eV and .002 eV
5. Imagine an electron confined in one-dimensional potential box of width L = 0.12 nm. Compute the energy of the first three energy levels.
a. 3.2 x 10^(-18)J 2.7 x 10^(-17)J 4.8 x 10^(-17)J
b. 4.2 x 10^(-18)J 1.7 x 10^(-17)J 3.8 x 10^(-17)J
c. 2.2 x 10^(-18)J 1.3 x 10^(-17)J 2.8 x 10^(-17 J
d. 2.2 x 10^(-18)J 2.7 x 10^(-17)J 4.8 x 10^(-17)J
6. The ground-state energy of an electron confined along the x axis is 6.03 x 10^-18 J. What is the approximate length of the region to which the electron is confined?
a. 0.3 nm
b. 0.1 nm
c. 1.2 nm
d. 2.4 nm
7. A wave function within a barrier is described by psi(x)=psi(0)e^(-ax). What is the probability density for finding the wave at x= 3/a? Give your answer as a multiple of psi(0)^2.
a. .00248
b. 2.45
c. 1.23
d. 12.4
|
Approximate distribution of blood type
: Suppose that the data in Table represent approximate distribution of blood type frequency in percentage of total population.
|
|
Derive the infinite square well energy quantization law
: Derive the infinite square well energy quantization law, directly from the DeBroglie relation p=h/l, by fitting an integral number of half DeBroglie wavelengths l/2 into the width a of the well.
|
|
What is the value of kb
: Under steady-state operating conditions, measurements reveal an outer surface temperature of Ts,o = 20 °C, an inner surface temperature of Ts,i = 600 °C, and an oven air temperature of T&= 800 °C.
|
|
Write the author name title of essay
: Directions: Write your name, course title, time of class, and the date at the top of the page. Write the author's name, title of essay, Formulate in your own words the author's thesis (argument or main point) in the first paragraph
|
|
What is the energy of the x ray after scattering
: A slowly moving electron is localized to be within 0.50mm of a particular point. What is the minimum uncertainty ith which its velocity can be simultaneously determined?
|
|
What are the implications for the nursing profession
: What are the implications for the nursing profession? Have nurses lost their traditional role of hands-on patient care and, if so, is that to the profession's and the patients' advantage or disadvantage?
|
|
What is the probaility of finding the electron in a volume
: If a hydrogen atom is in the ground state, what is the probaility of finding the electron in a volume of 1.0 pm^3 at a distance of 52.9 pm from the nucleus, in a fixed but arbitrary direction?
|
|
What is the main ingredient in street meth
: What is the main ingredient in street meth? Where is "ingredient" it made? What is the DEA doing to slow down production of street meth?
|
|
Examine alternatives to health and wellness
: Examine alternatives to health and wellness and promote when appropriate. Identify daily behavior/activity influencing health and apply helpful modifications lending influence or improvement when beneficial.
|