Physics Homework Solutions

detecting radioactivity

I am doing a project 4 Physics and i can't find enough stuff on photographic material, i was hoping u could send me some stuff, its for standard grade(credit)/gcse

Decay of radioactivity

I have 10000000000 Bq (bequerel) of I-123 in 2 cc of saline on Monday at 8 Am a) What is the concentration at 8Am b) What volume should I inject on Monday at 8Am if I wish to inject 40 Mbq c) What volume should I inject on Tuesday at 8AM if I wish to inject 60 MBq d) After the injection on Tuesday, what activity of I-123 is ...continues

Electron Shielding

You are a radiation scientist working for the space agency. A Mission Coordinator asks you to design shielding to prevent monoenergetic 10 MeV electrons from interacting with a cell culture that is to be flown on an upcoming space shuttle mission. The cell culture is covered with a 1 cm thick sheet of Lucite (density = 1.19 g/cm ...continues

Neutron Absorption

What thickness of cadmium is required to absorb 50% of an incident beam of thermal neutrons? Given: σ_capture = 2550 barns, ρ=8.65 g cm^-3, MW=112.4.

Pocket Ionization Chamber

Pocket ionization chambers are built in the form of an electrical capacitor. You know that capacitance is equal to a change in charge over a change in voltage, as C = ∆Q/∆V, where the capacitance, C, is in Farads (F), the voltage, V, is in volts (V) and the charge, Q, is in coulombs (C). You have a chamber that ha ...continues

The problem is attached as word document file with all mathematical expressions and pic.

Problem: For continuous wave Doppler ultrasound the transmitting and receiving transducers are usually mounted next to each other i.e. with approximately zero angular separation. However, it is possible to have the transmitter and receiver at different angles to the vessel. Use the configuration shown below to derive the ...continues

Radioactive decay

Radioactice substances decay exponentially. The amount of radium present at an time t obeys the law Q(t)= Qoe^-kt, where Qo. is the initial amount present and k is a suitable positive constant. The half-life of a radioactive substance is the time required for a given amount to be reduced by one-half. Now, it is known that the ha ...continues

MATLAB code

i have a matlab code for a skull filled wth solid water and i want to put air at the places of Acoustic neuromata i.e. in sinus region and near the ears(and rest of skull will remain as it is i.e. filled with with solid water ) See attached matlab code and word file for help

MATLAB code

Using given geometry code...

wht is the radius of skull if....

What is the radius of the skull if the skull has dimensions 200*200*200 and where will its centre of gravity be?

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