Calculate the average energy U(T) and entropy S(T) of a paramagnet with two energy states ±μH in the presence of magnetic field H. Take the limits of high and low temperature and draw schematically the U(T) and S(T) dependences for two different values of H.

You cool a 130.0 g slug of red-hot iron (temperature 745 ?C) by dropping it into an insulated cup of negligible mass containing 75.0 gof water at 20.0 ?C. Assume no heat exchange with the surroundings.

Part A)

What is the final temperature of the water?

Part B)

What is the final mass of the iron and the remaining water?

In your own words:

1. (i) Use the Huygens principle to explain how plane parallel wavefronts are diffracted at a single aperture.

2. (ii) Use the principle of superposition to explain how coherent light emerging from two narrow slits can interfere to produce a pattern on a distant screen.

You are working as an assistant to your cousin, who is an architect. She is currently designing the lobby for a new luxury hotel. The lobby will include a walkway suspended above the main level. Her design will include the following features. Above the walkway, attached at various points along its length, will be vertical steel cables of diameter 1.27 cm and unstressed length 5.65 m. These cables will run upward from the walkway and be attached to a rigid beam in the internal structure of the lobby. Below each point of attachment of a vertical cable will be an aluminum column on which the walkway rests. Each column is a hollow cylinder of inner diameter 16.04 cm and outer diameter 16.18 cm. Before the walkway is installed, the columns will extend 3.25 m from the floor of the lobby to the height at which the bottom of the walkway will lie. Suppose the walkway and any individuals walking on it exert a downward force of magnitude F = 8,900 N on a particular attachment point to a cable above and the corresponding column below. Before committing to this design, your cousin asks you to determine how far the point of attachment of the walkway will move downward under these load conditions.

Is this email good?? ( I mean grammatically and academy)

To Whom It May Concern

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What is the difference between semiclassical probability density and classical probability density?

Note: This is for a quantum physics 2 course.

The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.22 kg and is moving along the x axis with a velocity of 5.80 m/s. It makes a collision with puck B, which has a mass of 0.44 kg and is initially at rest. After the collision, the two pucks fly apart with angles as shown in the drawing (? = 66° and ? = 32°). Find the final speed of puck A.

You are to design a thin lens for eyeglasses that will have a focal length of 10 cm. You only have tools that will allow you to shape glass surfaces with the following radii for convex surfaces: 4, 8, 12, 16, 18, and 21 cm, and the following radii for concave surfaces 3, 6, 7, 10, 12 and 14 cm. The glass to be used has an index of refraction of 1.48. Determine a combination you can use to make this lens. State the radii of curvature used for each surface, and whether it is concave or convex.

A 43.0 g ball is fired horizontally with initial speed v0toward a 107 g ball that is hanging motionless from a 1.2 m -long string. The balls undergo a head-on, perfectly elastic collision, after which the 107 g ball swings out to a maximum angle θmax = 50.0 ∘.

What was v0?

what are the pros of using traditional value stream mapping (VSM) in going from a current state of "push" contol to re-design of a "future" state "pull" process and how does it contrast to using VSM in using factory physics principles to change the current process

A transmission wire oriented parallel to the x-axis carries a current of   200 A   flowing along the +x direction. A second transmission wire also oriented parallel to the x-axis but lying at a perpendicular distance of   1.25 m   below the first wire carries a current of   250 A flowing along the +x direction. What is the magnitude of the total magnetic field at a point midway between the two wires?

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

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Part B

What is the direction of the net magnetic field in part A?

Select the applicable choice.

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Select the applicable choice.

Part C

A transmission wire oriented parallel to the y-axis carries a current of   200 A    flowing along the +y direction. A second transmission wire also oriented parallel to the y-axis but lying at a perpendicular distance of   1.25 m    below the first wire carries a current of   250 A    flowing along the +y direction. What is the magnitude of the total magnetic field at a point   2.10 m   directly below a point midway between the two wires?

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

Part D

What is the direction of the net magnetic field in part C?

Select the applicable choice.

View Available Hint(s)

Select the applicable choice.

Part E

A transmission wire oriented parallel to the y-axis carries a current of   200 A    flowing along the +y direction. A second transmission wire also oriented parallel to the y-axis but lying at a perpendicular distance of   1.25 m    below the first wire carries a current of   250 A     flowing along the +y direction. If the location where the net magnetic field is zero is at perpendicular distance  d from the first wire, what is d ?

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

Part F

A transmission wire oriented parallel to the z-axis carries a current of   200 A    flowing along the +z direction; the wire passes through the point (4.20 m, 0 m, 0 m) on the x-axis. A second transmission wire also oriented parallel to the z-axis carries a current of   250 A    flowing along the -z direction; the wire passes through the point (0 m, 4.10 m, 0 m) on the y-axis. What is the magnitude of the total magnetic field at the origin?

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

what essential contruction design is needed to recieve an incomming horizontal EM wave if the reciever is built for interpreting changes in the electric field? what if it was built to recieve the magnetic field?

Please post answers in excel showing all formulas used.

Refer to the gasoline sales time series data in the given table.

1. Compute four-week and five-week moving averages for the time series. Round your answers to two decimal places.
   

   Week	Sales	4-Week Moving Average	5-Week Moving Average
   1	18
   2	21
   3	19
   4	22
   5	18
   6	16
   7	20
   8	19
   9	23
   10	19
   11	16
   12	22

2. Compute the MSE for the four-week and five-week moving average forecasts. Round your intermediate calculations and final answers to two decimal places.
   
   MSE for four-week moving average =  
   
   MSE for five-week moving average =
   
3. What appears to be the best number of weeks of past data (three, four, or five) to use in the moving average computation? Recall that MSE for the three-week moving average is 9.
   
   

(a) What is the advantage and disadvantage images from radioactivity compared imaging from ultrasound, x-ray and CT?

(b)Explain in detail the operation of a PET scanner, illustrating your points by using more than one drawing, appropriately labeled.