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a collimated beam of 200 kev gamma radiation delivers an incident energy flux of 2 j m-2 s-1 to a lead shield 1 g cm-2
pocket ionization chambers are built in the form of an electrical capacitor you know that capacitance is equal to a
which polarization state of light is transmitted and absorbed and why in regular plastic polarizers which are actually
1 electron interactions were characterized by a ratio ba the ratio ba representsa orbital electron distance to nuclear
1 the average human body has a temperature of 30 degrees celcius a skin surface are of 120mt2 and an emissivity of 10a
1 the first part of the argument questions why dont we see things left behind by the earth as it spins and travels
assume that the body of an airplane is considered as a 20-m long hollow cylindrical structure made up of unknown
saturated steam at 40 psia is throttled to 1 atm and mixed adiabatically with and condensed by 45-wt- sulfuric acid at
what is the difference between natural selection and ecological successionwhat are the first and second laws of
1 a home builder installs electric baseboard heat and claims it is the cheapest and cleanest way to go apply your
1 energy can be converted to one form or another but cannot be created or destroyed this the theory of- calorimetry-
problem consider two spin systems a and a placed in an external field h system a consist of n weakly interacting
draw a flashlight bulb and show where the current usually enters and leavesdraw a d-cell and label its two terminals
1 the resistance of a superconducting material drops essentially to zero rather suddenly whena the sample is heated
1 if the speed of sound is 350 ms and the wavelength is 10 cm what is the frequency2 two otherwise identical wires are
1 which is a correct statementa visible light has a frequency of 10 to the power of 14 hzb gamma rays have a frequency
1a what is the purpose of the lightning rod and how does it workb why is the car interior a safe place to be during a
1 in alternating current the motion of the chargesa continuously changes in the forward and reverse directionsb is
1 if a lamp is measured to have a resistance of 45 ohm when it operates at a power of 80 w what is the current in the
1 a charge of 1020 c was passed through a wire in 55 min what was the average electric current during that interval2
1 it is generally dangerous to tuck electrical extension cords away behind furniture under carpets or anywhere else
test questions1 which of the following is not true about the electric potential va v at a point is the electric
consider a spherically symmetric configuration a spherical charge distribution has radius ra and nonuniform charge
1 calculate the capacity of a conductor that when you charge it with 0004c acquires a potential of 220v2 a total
a thundercloud has the charge distribution as shown on the diagram treat this distribution as two point charges a