Physics Modern Physics Level: University
Dual Nature Davission and germer experimentX-rays of wavelength10.0 pm are incident on a target. Find the wavelength of the x-rays scattered at (a) 45.0degree (b) 90.0 degree.
Physics Modern Physics Level: University
Photo electric effectIf the shortest wavelength produced by an x-ray tube is 0.46 nm, what is the voltage applied to the tube?
Physics Modern Physics Level: University
Dual nature Photo electric effectThe minimum energy required to remove an electron from a metal is 2.60 eV.What is the longest wavelength photon that can eject an electron from this metal?
Economics Misc Topic Level: University
Cigarette Smoking Price Elasticity of DemandAnalyze the Issue
According to the above discussion, what factors influence the price elasticity of demand for cigarettes? What other factors not mentioned in the article might also influence the price elasticity of demand for cigarettes? Use graphs as well if possible.
Is GDP A False Beacon Steering Us Into The Rocks?
Analyze the Issue
Suppose a nuclear power plant disaster occurs. How could GDP be a “false Beacon” in this case? Show graph as well if possible.
Is It a Robot’s World?
Analyze the Issue
1. Are the musicians experiencing frictional, structural, or cyclical unemployment? Explain.
2. What solution would you propose for the trumpet plays mentioned above?
Use graphs as well when possible.
When the Inflation Rate is 116, 000 Percent, Prices Change by the Hour
Analyze the Issue
1. Can you relate inflation psychosis to these excerpts? Give an example of a debtor-lender relationship that is jeopardized by hyperinflation.
2. Explain why the workers in Bolivia were striking even though wages rose at an annual rate of 1500 percent. Do you see any connection between hyperinflation and the political system? Use graphs as well if possible.
Question Diagram
Physics Misc Topic Level: University
A transmission line is made of aluminum wire 1 inch in diameter. What is the resistance of 20 miles of this wire?
Physics Misc Topic Level: University
Explain why a tremendous noise produced on the moon would not be heard on earth.
Physics Misc Topic Level: University
How does the primary voltage of an induction coil differ from the secondary voltage? What is the general purpose of induction coil?
Mathematics Algebra Level: University
Draw the graph for the following linear equations.Y= X + 7
Mathematics Algebra Level: University
Draw the graph for the following linear equation.Y + 4X =8
Mathematics Algebra Level: University
Draw the graph for the following linear equation.x + 2y =3
Biology Misc Topic Level: University
Genetics
Four homozygous recessive mutant lines of Drosophila melanogaster (labeled 1 through 4) showed abnormal leg coordination, which made their walking highly erratic. These lines were intercrossed; the phenotypes of the F1 flies are shown in the following grid, in which “+” represents wild-type walking and “-“ represents abnormal walking:
| | 1 | 2 | 3 | 4 |
| 1 | - | + | + | + |
| 2 | + | - | - | + |
| 3 | + | - | - | + |
| 4 | + | + | + | - |
a. What type of test does this analysis represent?
b. How many different genes were mutated in creating these four lines?
c. Invent wild-type and mutant symbols and write out the full genotypes for each of the four mutant lines.
Biology Misc Topic Level: University
A homozygous line of parakeets with blue feathers and banded wings was crossed to a homozygous line of parakeets with green feathers and unbanded wings. The F1 progeny from this cross had green feathers and banded wings. Brother to sister matings were conducted among the F1 animals and the following F2 progeny were recovered:Green feathers and banded wings: 121
Green feathers and unbanded wings: 29
Blue feathers and banded wings: 33
Blue feathers and unbanded wings: 2
Total 185
- a. If the genes that produced these phenotypes were unlinked, what would be the expected numbers of F2 cross progeny in each of the phenotypic classes?
- b. Use a chi-squared test to determine if these genes are linked. The Equation for Chi Squared is in answer attachment, and the Chi Squared table is on the last page of the exam.
- c. State in a single complete sentence: what is your interpretation of this Chi Squared result?
Statistics Misc Topic Level: University
GPA And Pertinent StatisticsA researcher collected this data on the college GPA of 27 people, along with their High School GPA, SAT score and the number of letters of recommendation they had for their college application. Is there a significant relationship between these variables and college GPA? Which has the highest absolute impact? If there is a significant relationship, which variables contribute significantly? What is the GPA of someone who had zeros for all of the variables? Include hypotheses for any tests performed, as well as pertinent statistics.
Question Diagram
Physics Waves And Oscillations Level: High School
A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz . What is the maximum speed of the needle ?a) 3.18 cm/ s
b) 20.3 cm /s
c) 10.1 cm/ s
d) 6.36 cm / s
Physics Waves And Oscillations Level: High School
In simple harmonic motion , the speed is greatest at that point in the cycle when :a) The magnitude of the acceleration is a maximum .
b) The displacement is a maximum .
c) The magnitude of the acceleration is a minimum .
d) The potential energy is a maximum .
