We anticipate that deadly two vehicle motorcycle accidents occur at the same frequency on all seven days of the week. However, is this true? The table shows the number of two-vehicle crashes including a motorbike and a passenger vehicle, with day of week, in a random sample of 1,792 accidents

A.What is the null and the alternative hypothesis.

B.Find the χ2 statistic and the degrees of freedom.

C.Use the critical value way to find the P-value with a significance level of α=0.05

D.What is the conclusion

4. The heart of the original Apple iPad is the Apple A4 chip which operates at 1.0 GHz and is believed to utilize ARM Cortex-A8 CPUs built with Samsung 45nm technology. Assume it dissipates 5 watts using a 1.1 V power supply.

a) If a prototype made in 65 nm is available, what speed and power consumption will the chip likely have assuming constant-field scaling?

b) If the supply voltage on the 65 nm part were scaled to 0.7 V, what will the power consumption and speed be then?

c) i) What supply voltage should be used by the 45 nm part to set the power consumption of 2.5 Watts?

ii) At what speed would the processor then operate?

Consider three different processors P1, P2, and P3 executing the same instruction set. P1 has a 3 GHz clock rate and a CPI of 1.5. P2 has a 2.5 GHz clock rate and a CPI of 1.0. P3 has a 4.0 GHz clock rate and has a CPI of 2.2.

a. Find execution time for each processor for a program with 2 x 10 9 instructions. Which one is the fastest?

b. If the processors each execute a program in 10 seconds, find the number of instructions that they are running? We are trying to reduce the execution time by 20% but this leads to an increase of 10% in the CPI. What clock rate should we have to get this time reduction for each processor?

MATLAB QUESTION

Write a python program to request a positive float input from the user, x. The program should check for the value of x. If x is larger than or equal to 1.0, the program should display the value of x in addition to the string “is larger than or equal to 1” and then terminate the program. If x is less than 1 the program should calculate y such that: y = 1-x+x^2/2-x^3/3+x^4/4-x^5/5……-x^99/99+x^100/100 The program should then display the value of y and then terminate. Also, the program should use “try and except” to check for non-numerical values for x.

Based on the balance sheet below, answer the following questions.

a) Based on the balance statement above, calculate the level of capital that Melvin's must hold to satisfy the minimum equity ratio (5%)

b) Based on the balance statement above, calculate the level of capital that Melvin's must hold to satisfy the risk based Basel requirement (8%)

c) which of the two requirement is more stringent in this case? If so, why?  

For the given reports, are the given values of the correlation coefficient reasonable?

1. A) A correlation of r = +0.7 between gender and height.

i) Reasonable ii) Unreasonable

1. B) A correlation of r = +1.0 between outdoor temperature and sales of ice cream.

i) Reasonable ii) Unreasonable

1. C) A correlation of r = 0 between shoe size and IQ scores in a study of adults.

i) Reasonable ii) Unreasonable

1. D) A correlation of r = +0.7 between distance from the equator for North American cities and average January temperature.

i) Reasonable ii) Unreasonable

1. E) A correlation of r = -0.8 between outside temperature and sales of hot chocolate.

i) Reasonable ii) Unreasonable

Question 1:

A near-sighted person might correct his vision by wearing diverging lenses with focal length f = -50cm . When wearing his glasses, he looks not at actual objects but at the virtual images of those objects formed by his glasses. Suppose he looks at a 12cm -long pencil held vertically 2.0m from his glasses. Use ray tracing to determine the location of the image. Answer is in meters.

Question 2:

A 1.0-cm-tall object is 60 cm in front of a diverging lens that has a -30 cm focal length.

a) Calculate the image position in cm.

b) Calculate the image height in cm.

Show work please! Thank you!!

The cubit is an ancient unit of length based on the distance between the elbow and the tip of the middle finger of the measurer. Assume that the distance ranged from 43 to 53 cm, and suppose that ancient drawings indicate that a cylindrical pillar was to have a length of 5.0 cubits and a diameter of 1.0 cubits. For the stated range, what are the lower values for (a) the cylinder's length in meters, (b) the cylinder's length in millimeters, and (c) the cylinder's volume in cubic meters? What are the upper values for (d) the cylinder's length in meters, (e) the cylinder's length in millimeters, and (f) the cylinder's volume in cubic meters?

I am having a real hard time with this. My answers are always wrong. If you can explain it to me then I will thank you.

1. For what kinetic energy is the de Broglie wavelength of an electron equal to its Compton wavelength? Express your answer in units of mc2 in doing the calculation, and then use mc2 = 0.5 MeV.(Answer: 0.2 MeV)

2. A beam of electrons with energy 1.0 eV approaches a potential barrier with U = 2.0 eV, whose width is 0.10 nm (see a figure below). Estimate the fraction of electrons that tunnel through the barrier. (Hint: use the relation of probability and the wave function, and the expression for wave function for barrier penetration)

3. Calculate the Fermi energy of sodium (n= 2.65·10^28 m^-3). This metal has a single valence electron per atom.(Answer: 3.25 eV.)

1. What is the reason why activites are often called effective concentrations? Explain why there are differences between activities and concentrations.

2. Methane dissociates into H2(g) and C(s, graphite).

- Calculate the equilibrium constant K at 298 K.

- Calculate K at 50°C (assuming that ΔrH^Θ is temperature independent.

- Calculate α (degree of dissociation of methane) at 25°C and a total pressure of 0.010 bar.

3. What is the value of ΔrG for the reaction

NO2(g) ⇔ N2O4(g) when

Q = 0.1

Q = 1.0

Q = 10.0

Q= 100.0

Estimate (by interpolation) the value of K from the values you calculated.

Compare with the value obtained from the thermodynamic definition of the equilibrium constant.