Kissndie.blogspot.com

2020-05-29T08:26:00.002-07:00

1.Question 1

The emission spectrum of Object X is shown below:

On the other hand, the emission spectra of hydrogen, helium, oxygen, calcium and sodium are given below:

(Image Credit: NASA)

What elements make up the Object X, based on the spectrum given above? Select all that apply.

Hydrogen and sodium

Which of the following order of particle size is correct?

2020-05-29T08:20:00.001-07:00

Which of the following order of particle size is corrQuark > Atom > Nucleons (Proton and Neutron) > Nucleus

Atom > Nucleus > Nucleons (Proton and Neutron) > Quark

Atom > Nucleons (Proton and Neutron) > Nucleus > Quarkect?

Even though the Higgs boson is essential for our existence, it is hard to notice it because

2020-05-29T07:52:00.001-07:00

Even though the Higgs boson is essential for our existence, it is hard to notice it because

The Higgs boson does not have electric charge, and hence cannot interact with electrons.

Higgs bosons barely interact with other particles just like neutrino.

The Higgs boson is too heavy, and therefore it needs enormous amount of energy to produce it in nature.

Higgs bosons are frozen rigidly everywhere in space

You want to treat each patient with some form of radiation therapy. How do you pair the patients with the curves in figure1?

2020-05-29T07:32:00.002-07:00

4.Question 4

Radiation is a useful tool in treating cancerous tumors. In the past few decades, proton beam radiation therapy (PBRT) has been developed as a new option for treating tumors. PBRT accelerates protons in a synchrotron and then delivers them into the body. The main difference between proton therapy and radiation therapy with, for example x-rays, is that the proton loses most of its energy just before it stops. This means that the radiation dose can be dumped at a very specific location; a proton enters the body and emits little radiation until it reaches the tumor and stops, emitting a large amount of radiation to damage the tumor. This is shown in figure1; the peak of radiation dosage at the end of the proton's path is known as the Bragg peak. Currently there are about 40 PBRT treatment centers in the world, with about 25% of them in the US and 25% in Japan.

Now imagine you are a doctor and you have three patients with the following types of cancerous tumors:

(i) Patient 1 has a breast tumor just below her skin.

(ii) Patient 2 has a small brain tumor, a few mm in size, located in the middle of the brain.

(iii) Patient 3 has a brain tumor that is a few cm in size and located in the middle of the brain.

Figure 1: The radiation dosage as a function of depth in tissue. Protons lose most of their energy right before they stop, resulting in the so-called Bragg peak seen in curve (a). The proton beam can be modulated to spread out the Bragg peak, as seen in curve (b). For comparison, an x-ray is shown in curve (c). Source: http://en.wikipedia.org/wiki/File:BraggPeak.png Image Credit: Dr A A Miller, CC BY-SA 3.0

1 \leftrightarrow (c), 2 \leftrightarrow (b), 3 \leftrightarrow (a)1↔(c),2↔(b),3↔(a)

1 \leftrightarrow (a), 2 \leftrightarrow (c), 3 \leftrightarrow (b)1↔(a),2↔(c),3↔(b)

1 \leftrightarrow (b), 2 \leftrightarrow (c), 3 \leftrightarrow (a)1↔(b),2↔(c),3↔(a)

1 \leftrightarrow (c), 2 \leftrightarrow (a), 3 \leftrightarrow (b)1↔(c),2↔(a),3↔(b)

In which of the followings, particle accelerators can be found? Select all that apply.

2020-05-29T07:23:00.002-07:00

Hospitals

A modern flatscreen television

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2010-02-21T22:01:00.001-08:00

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2010-02-15T13:25:00.000-08:00

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2010-02-15T13:18:00.001-08:00

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Deepika Padukone on the Maxim Magazine | Hot Maxim Scans , Pictures | HQ | Looking Gorgeous, Beautiful

2010-02-12T00:29:00.000-08:00

She won the 2008 French Open

2010-02-12T00:24:00.001-08:00

Tennis beauty and model Ana Ivanovic has done a new bikini photo shoot for Sports Illustrated.

Ana Ivanovic, is a former World No.1 Serbian tennis player. As of February 1, 2010, she is ranked World No. 23 by the Women's Tennis Association.

She won the 2008 French Open and was the runner-up in singles at the 2007 French Open and the 2008 Australian Open.

Kareena Kapoor in a short black dress shows off her Panty | Upskirt Pic | Exposes her beautiful legs

2010-02-12T00:22:00.000-08:00

Kareena Kapoor in A Very Sexy Mini Dress Shows off her Cleavage, Legs, Thighs

2010-02-12T00:21:00.000-08:00

Sonam Kapoor New Picture | Looking Cute and Beautiful | boobs

2010-02-12T00:16:00.000-08:00