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D- Ultrasonic wave Heating
These waves are different from electromagnetic waves . It produces mechanical vibration inside tissue. It is the same as the sound waves but it has much higher frequencies about I MHz with power of several watts per centimeter. It can move the tissue particles backward and forward with high frequency, in doing so it can increase the kinetic energy consequently it heats the tissue.
Ultrasound can be produced by special transducers placed in direct contact with the skin. It is used for relieving tightness and scarring occurring in jointdisease. It can dispose more heat in bones, as bones are better absorber for ultrasonic energy than soft tissue. It is also used in deep therapy.
A transformer is a static device which transfers AC electrical power from one circuit to another at the same frequency but the voltage level is changed usually. When the voltage is
A ball falling vertically from rest for 3 seconds travels very nearly: a) 14.7 meters b) 29.4 meters c) 44.1 meters d) 88.2 meters Ans: A ball falling ve
A water skier lets go of the tow rope upon leaving the end oaf jump ramp at a speed of 14.0 m/s. The skier has a speed of 13.0m/s at the highest point of the jump. Ignoring air res
The birghtness of objects past Neptune actually varies approximately as 1/d^4. Why is that the case?
Moderation: In a nuclear reactor, the fast moving neutron has to be slowed down by the use of Boron rods before they are able to cause further fission. The process of slowing d
Q. How does the height and air pressure affect the boiling point of water? Answer:- The only factor that finding the boiling point of water at any altitude is the barometr
assignment
what is the result of principle of superposition
an oven is turned on at a room temperature of 20C and it takes 10 min to reach a temperature of 190C.a try of cookies is placed in the oven to bake for 10 min.the oven is then turn
The resistances of commercially-available discrete resistors are restricted to particular sets. For example, the available values of resistors with 10% tolerance are selections fro
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