Summarize the Acoustic Theory of Speech/Vowel Production

Two thin, isolated, concentric conducting spheres of radii 1.10 cm and 7.70 cm, have net charges of 13.50 nC and 4.00 nC, respectively. Use the sign of the field to indicate direction, thus a positive electric field would point away from the center of the spheres.
a) What is the electric field at 0.660 cm from the center of the spheres?
b) What is the electric potential at 0.660 cm from the center of the spheres?
c) What is the electric field at 3.740 cm from the center of the spheres?
d) What is the electric potential at 3.740 cm from the center of the spheres?
e) What is the electric field at 8.085 cm from the center of the spheres?
f) What is the electric potential at 8.09 cm from the center of the spheres?

I have found all of the electric fields but don't know how to find the electric potential.

Possible Duplicate:
What is a complete book for quantum field theory?

At the moment I am studying

Piron: Foundations of Quantum Physics,

Jauch: Foundations of Quantum Mechanics, and

Ludwig: Foundations of Quantum Mechanics

All of them discuss nonrelativistic quantum mechanics.

Now my question is, if there are corresponding approaches to quantum field theory (in particular aiming to the standard model of particle physics).

Edit (in response to noldorin's comment): I think if one knows the books mentioned above, the question is not very vague. Take for example Ludwigs approch. For instance it is written with the aim in mind to provide clear foundations of nonrelativistic quantum mechanics which match Ludwigs epistemological theory about physics ("A new foundation of Physical Theories"). It is axiomatic, mathematical sound, emphasises the idea of preperation and registration procedures, uses the mathematical language of lattice theory etc. However since I am studying this book at the moment I might miss some important points in Ludwigs approach. So I ask a bit vague if there is an approach to QFT which corresponts in your view to Ludwigs approach to nonrelativistic quantum mechanics in the most essential points (from your point of view) (in style, epistemological background, mathematical language etc.). Perhaps there are students of Ludwig which transfered and developed his ideas for QFT as well, I don't know

Use Voice Onset Time to explain what it means when we say that we perceive speech sounds categorically? Be sure to talk about discrimination

A 960kg car is at the top of a 46m -long, 2.5 ? incline. Its parking brake fails and it starts rolling down the hill. Halfway down, it strikes and sticks to a 1210kg parked car.
Part A-

Ignoring friction, what's the speed of the joined cars at the bottom of the incline?

Express your answer to two significant figures and include the appropriate units.


Part B-

What the first car's speed would have been at the bottom had it not struck the second car.

Express your answer to two significant figures and include the appropriate units.

You are planning a trip to go see relatives for the Holiday Break. You know your relatives live in a city which is 250 km away. If you can average a speed of 60 mile per hour, how long will you need to plan to get there?

a) 15000 minutes

b) 4.2 hr

c) 9300 sec

d) 160 minutes

For an average human, the actual values of the densities of the fat and lean tissues are ρ_f = 0.9 g/cm³, and ρ_l = 1.1 g/cm³ respectively (fat tissue =ρ_f and lean tissue =ρ_l). Given these values, are there limitations on the body fat percentage of a human that can be suspended in a body of water? Explain your thoughts and calculate the limits if any.

HINT:

• What are the maximum and minimum possible densities of a human? Is it possible for objects with each of these densities to be suspended in (as opposed to floating on top of) water?

PLEASE PROVIDE AN EXPLANATION

2.

a) Why does the Doppler effect differ in the case where the source moves to the fixed observer, from the one in which the observer moves to a fixed source?

b) Explain what the resonance effect consists of. Give an example.

Please answer the questions with maths! and explain physically, thank you in advance !

How many fringes appear between the first diffraction-envelope minima to either side of the central maximum in a double-slit pattern if λ = 699 nm, d = 0.200 mm, and a = 36.9 µm? (b) What is the ratio of the intensity of the third bright fringe to the intensity of the central fringe?

The figure presents a skier at Point A, at the top of a ski jump, which curves steeply downward and to the right, passes through point B, and then curves back upward and ends at point C. The height at point A is h sub 1, the height at point B is 0 meters, and the height at point C is 10 meters. h sub 1 is greater than 10 meters. A ski jumper starts from rest from point A at the top of a hill that is a height h1 above point B at the bottom of the hill. The skier and skis have a combined mass of 80 kg. The skier slides down the hill and then up a ramp and is launched into the air at point C that is a height of 10 m above the ground. The skier reaches point C traveling at 42ms. (a) Calculate the height h1. Question 2 (b) Calculate the speed of the skier as the skier reaches point B. Question 3 (c) Is the work done by the gravitational force on the skier as the skier slides from point A to point B positive or negative? ____ Positive ____ Negative Justify your answer. 4 The skier leaves the ramp at point C traveling at an angle of 25° above the horizontal. (d) Calculate the kinetic energy of the skier at the highest point in the skier's trajectory. Question 5 (e) i. Calculate the horizontal distance from the point directly below C to where the skier lands. Question 6 ii. If the angle is increased to 35°, will the new horizontal distance traveled by the skier be greater than, less than, or equal to the answer from part (e)(i) ? ____ Greater than ____ Less than ____ Equal to Justify your answer. After landing, the skier slides along horizontal ground before coming to a stop. The skier’s initial speed on the ground is the horizontal component of the skier’s velocity when the skier left the ramp. The average coefficient of friction μ is given as a function of the distance x moved by the skier by the equation μ=0.20x. (f) Calculate the distance the skier moves between landing and coming to a stop.

A copper disk at 850 degrees celsius rotating about its axis with an angular speed of 25 rad/s in the outer space. As the disk radiates infrared light, its temperature falls to 20 degrees celsius. No external torque acts on the disk. Does the angular speed of the disk change as it cools?

You wish to build a linear accelerator that will accelerate electrons to ?=89 % of the speed of light. You want adjacent drift tubes to be at +5000V and −5000V potentials. To work this problem, you will need the relativistic formula for kinetic energy. (?=??2/2 doesn't work for really fast particles.) Kinetic energy is ?=?0(?−1) where ?0 is the rest energy of an object. The rest energy of an electron is 0.511 MeV. [Remember that if we want to convert eV to SI units, all we have to do is put ?=1.60×10−19 C into the equation; however, for this problem, it's easiest just to leave everything in eV.] How many drift tubes do you need? Hints: The energy an electron gains is ??=??? in each gap. Just find the total kinetic energy by using the formula. Remember that you need one more drift tube than there are gaps. Range of answers: 45 to 115

hint: β= 90.7 %, correct answer is 72

β= 86.9, correct answer is 54

A block with a mass of 2.50 kg on a spring has displacement as a function of time given by the equation
x(t)= (7.9 cm) cos [5.5 rad/s) t - 2.42 rad].

Part A: what is maximum kinetic energy during oscillation? (.......J)

Part B: what is the velocity of block at t = 2.3 s ? (.....m/s)

Part C: if kinetic energy and potential energy are equal, what is the positive value of the displacement? (X=.....cm)