Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Explain Radioactivity and its Problems and Applications?All radiation, electromagnetic as well as the kind from nuclear decay, takes its toll on living organisms. If the radiation has enough energy it can disrupt the functioning of living cells. This is particularly harmful if the radiation damages the nucleic acid molecules which make up your genetic information. We are constantly being exposed to radiation from natural sources. Rocks contain radioactive elements, we are being bombarded by cosmic rays from space and our food and water contain radioactive particles. Additional amounts of radiation come from man-made sources such as testing from nuclear weapons, medical x-rays and nuclear power plants. All three types of radiation come in a variety of different energies, but we can make generalizations. Alpha particles are the least penetrating (they can be blocked by a t-shirt) but because of their large mass, they are the most harmful if they actually get into your system. Gamma rays are the most penetrating and require several centimeters of lead to stop them. Beta particles are somewhere in between. They can be stopped by aluminum foil. Using Radioactive Nuclides: Radioactive elements are easily found because they emit radiation. They can be used as tracers to show what is happening in plants and animals. A radioactive isotope of a molecule can be substituted for the regular atom used by a specific organ in your body. Doctors can follow the path of that tracer by detecting the movement as it wanders through your body. Areas of high or low radioactivity signal a problem area. Radioactive isotopes can also be used to target cancer cells. If you have a thyroid cancer doctors will often prescribe iodine-131.The iodine accumulates in the gland and the radiation destroys the cancer cells. For other types of cancer, external sources of radiation bombard the cancerous cells to destroy themSome naturally occurring nuclides can be used in archeological and geological dating. We already mentioned these applications in the section entitled Radioactive Dating.
a. Explain the following terms in connection with electro-magnetic waves: (i) Transverse waves (ii) Power density (iii) Wave impedance (iv) Polarization b. State the chara
Explain the Transmission of Heat Transmission of heat (movement of heat from the hotter item to the colder item) can be brought about three ways: by conduction, convection, and
Ask question 15. When the movable mirror of a Michelson''s interferometer is moved through a distance of 0.03mm, 100 fringes are displaced, what is the wavelength and color of the
Two long wires 'P' and 'Q', carrying equivalent currents of 5 Ampere and the distance among the wire is 5 cm. Determine the force applied on each wire if a. Current flowing in
(a) A cast steel ring has a cross-sectional area of 600mm 2 and a radius of 25mm. Verify the mmf essential to establish a flux of 0.8mWb in the ring. Use the B-H curve for cast st
Explain Scalars and Vectors This is one of the harder ideas to get used to when you start learning physics. The trick is to see that there is one basic difference between a sca
Figure shows a simple model of spring-mass system. The mass is released from the rest with the springs un-stretched. It's downward acceleration is a=9.81 - 15.24y m/s 2 where y is
In 1.0s, 5.0x10^23 nitrogen molecules strike an area of8.0cm^2 at a speed of 300m/s. What is the pressure? (mass of one nitrogen molecule = 4.68x10^-26 kg.) I believe I should use
in what depends the charge that each material has? like glass positive; polystyrene negative; and ebonite negative; at the moment of charge a rod of those materials...?
when a body is thrown upwards, its velocity becomes zero at the highest point. what will be its acceleration at this point?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd