1. Electric Dipoles vs Magnets. Name 2-3 similarities between electric dipoles and magnets in broad terms of forces and motion. Name 1-2 differences between electric dipoles and magnets.

2. Explain the meaning of Magnetic Field Superposition. What is superimposed on what?

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Q.

a single lossless dielectric slab of a thickness “d” and permittivity “ε2” is inserted between two regions. the first region is the free space and the second one is a lossless dielectric material of permittivity “ε3”. a uniform plane wave propagating in y- direction and polarized in z-direction is normally incident on the first region. derive an analytical expression for the total reflection coefficient and the phasor form of standing wave in the first region. what is thickness of the dielectric slab to achieve total transmission?

List and describe the significance of the quantum numbers needed to specify the internal state of a hydrogenic (i.e. meaning it only has one electron) atom.

Two children of the same mass m = 22:4 kg are playing on the rotating carousel below. The oor of
the carousel has mass M = 35:0 kg and radius R = 1:75 m. The centre of mass of each child is at a
distance of r = 30:5 cm from the centre of the carousel. The carousel is rotating at an angular velocity
of ! = 1:05 rad/s.
(a) (1 point) What is the tangential speed of the children?
(b) (1 point) What is the magnitude of the centripetal force on each child?
(c) (2 points) What is the angular momentum of the whole rotating system (carousel + children)?
(Ignore the mass of the bars and treat the children as point masses.)
(d) (3 points) A moment later, 2 more children of the same mass as the original two jump onto the
edge of the carousel on opposite sides. What is the new angular velocity of the whole system?
(Assume the new children are also point masses.)
(e) (1 points) After time t = 10s, the whole system (carousel + 4 kids) slows down to a stop. What
torque did friction exert on the system?

The human body has a blood volume of about 5 liters (p = 1060 kg / m3). The total volume of blood with a cell density of 1225 kg / m3 turned out to contain 1% white blood cells and 44% red blood cells. Red blood cells 7.5 x 106 m in diameter. Determine the total number of blood cells in human blood

Assume the two objects in question 3 are of the same physical size and are connected together with a conductor. Will charge move from object 1 to object 2 or from object 2 to object 1? Why?

a refrigerator uses refrigerant 134a as a working fluid and operates on the vapour -compression refrigiration cycle.the evaporator is maintained at -10⁰C and the refrigirant is a dry saturated vapour as it leaves the evaporator. the compressor has an efficiency of 80%.the conditions at the outlet of the condensor are 30⁰C and 9 bar.

1-if the mass flow rate of the refrigerant is 0,08kg/s workout the rate of heat removal from the refrigerant space.the power input to the cpmpressor and the COP of the refrigerator.sketch all state points and the cycle on the p-h diagram for the refrigerant

2state four desurable properties of a refrigerant

You're an investigator for the National Transportation Safety Board, examining a subway accident in which a train going at 84 km/hkm/h collided with a slower train traveling in the same direction at 20 km/hkm/h . Your job is to determine the relative speed of the collision, to help establish new crash standards. The faster train's "black box" shows that it began negatively accelerating at 1.8 m/s2m/s2 when it was 44 mm from the slower train, while the slower train continued at constant speed.

What is your report?

Delta V= ?

In aregion of space we find atime-varying magnetic flux density given by B = B0sin(ωt − ax −by)ˆzT. [11]

a. (3 pts) Determine the corresponding electric field intensity E.

b. (3 pts) Determine the relation between a, b and ω imposed by Maxwell’s equations.

c. (4 pts) Determine the magnetic flux Φm through the rectangular wire from (0,0,0) to π 2a, π d. (1 pts) What is the induced voltage in the above wire?

The Li2+ ion is hydrogenic and has a Lyman series at 740747 cm-1, 877924 cm-1, 925933 cm-1 and beyond. Show that the energy levels are of the form –hcR/n2 and find the value of R for this ion. Go on to predict the wavenumbers of the two longest wavelength transitions of the Balmer series of the ion and find the ionization energy of the ion.

Describe clearly an experiment in which you could determine the resistivity of a material. The materials include ammeters, voltmeters, batteries, connecting wires, and multiple pieces of wire made of the unknown material, each with different length and cross-sectional area, electronic balance, diffraction grating, a ruler, a caliper and an air track. The resistivity must be obtained as the slope of a graph. What quantities should be plotted along the axes?

Assume the two objects in question 3 are of the same physical size and are connected together with a conductor. Will charge move from object 1 to object 2 or from object 2 to object 1? Why?

MANAGE RISK

Question 1

You could be expected to outline the purpose and key elements of current risk management standards. Where would you find this information and how does it link to AS/NZS ISO risk management standards? (160 words)

Answer in your own words

Answer the following question:Be sure to show all your work. Include formulae and units! EVERY TIME!don't forgot to give relavant diagram.

1.To one liter of water at an initial temperature of 20⁰C is added 200 gm of ice at -5⁰C.Determine the final equilibrium temperature of the mixture, assuming the water/ice system is thermally isolated from its environment.