Physics, 01.10.2019 22:10 seymani2

Which particle is used as a beam to treat cancer?
electrons
protons
neutrons

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Answer from: mistiehaas

protons

Explanation:

Protons are positively charged elementary particles of hydrogen atom nuclei, and have a much greater weight than that of electrons.

In this sense, proton therapy consists in pointing to a tumor with an invisible and highly controlled beam that works with precision as if it were drawn with the tip of a pencil.

It should be noted that, firstly protons are accelerated inside a cyclotron at a speed that is equal to approximately half the speed of light (allowing them to have high energy) allowing the damage to tumors up to a depth of approximately 30 cm.

After the protons are accelerated in the cyclotron, they are directed with a strong magnetic field to a very narrow beam and transferred with a high degree of precision through the malignant tumor. This high amount of energy released in a controlled manner in the tumor tissue, results in ionization and damage to the DNA of the malignant cells that are attacked, causing them to stop dividing rapidly (the cause of cancer) or even causing the cells to die, immediately

This is a highly effective treatment that has no side effects in damage to healthy tissue surrounding the tumor, unlike X-ray therapies.

Answer from: Quest

the total distance traveled by the car is

30km + 49km = 79 km .

Answer from: Quest

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol

b. a hockey puck sliding across the ice

c. a compressed spring

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice is the correct option.

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Which particle is used as a beam to treat cancer?
electrons
protons
neutrons...

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