[Solutions] Friday Science Quiz #16

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[Solutions]

Q.1 Consider the following statements:
1. In osmosis, the solvent travels from the concentrated solution to the dilute solution.
2. In reverse osmosis, external pressure is applied to the dilute solution.
Which of the statements given above is/are correct?
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2
Ans-[D]
Statement 1 is wrong as in osmosis solvent molecules moves from low concentration solution to higher concentration solution through a semipermeable membrane.
Statement 2 is also wrong as in reverse osmosis external pressure is applied to the higher concentration solution. Solvent in this case move from concentrated solution to dilute solution. External pressure applied is above the osmotic pressure.
Q.2 Consider the following statements regarding supercomputer Sunaway Taihu Light:
1. It is the fastest supercomputer in the world.
2. It has been built using Chinese domestic chip technology rather than Intel processors which were used in previous fastest supercomputer.
Select the correct statement(s) using the codes given below:
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2
Ans-[C]
A Chinese supercomputer built using domestic chip technology has been declared the world’s fastest. The Sunway TaihuLight takes the top spot from previous record-holder Tianhe-2 (also located in China), and more than triples the latter’s speed. The new number one is capable of performing some 93 quadrillion calculations per second (otherwise known as petaflops) and is roughly five times more powerful than the speediest US system, which is now ranked third worldwide. The TaihuLight is comprised of some 41,000 chips, each with 260 processor cores. This makes for a total of 10.65 million cores, compared to the 560,000 cores in America’s top machine. In terms of memory, it’s relatively light on its feet, with just 1.3 petabytes used for the entire machine. It’s also unusually energy efficient, drawing just 15.3 megawatts of power — less than the 17.8 megawatts used by the 33-petaflop Tianhe-2. The previous fastest supercomputer, China’s Tianhe-2, was built using US-made Intel processors.

 

Q.3 Consider the following statements regarding ARIES telescope:

1. It is built by Indian – Belgian collaboration.

2. It is a ground based optical telescope.

3. It will be used to study star structure and their magnetic fields.

Select the correct answer using the codes given below:

a) 1 and 2 only

b) 2 and 3 only

c) 1 and 3 only

d) 1, 2 and 3

Ans-[D]

India’s largest ground-based optical telescope, in Devasthal in Uttarakhand, will be switched on March 30. The telescope is the product of an Indo-Belgian collaborative effort, assisted by the Russian Academy of Sciences, that was kicked off in 2007. It is going to be operated by the Aryabhatta Research Institute of Observational Sciences (ARIES), an autonomous research body under the Department of Science and Technology.

The instrument is part of a widening foray into observational research in astronomy that India has undertaken since the 1960s, and bolstered with the successful launch of its first multi-wavelength satellite (ASTROSAT) in September 2015. And apart from the merits it will accord Indian astronomy, the Devasthal optical telescope will also be Asia’s largest ground-based optical telescope, succeeding the Vainu Bappu Observatory in Kavalur, Tamil Nadu.

the telescope – held by ARIES – will be able to log the physical and chemical properties of stars and star clusters; high-energy radiation emanating from sources like blackholes; and the formation and properties of exoplanets.

 

Q.4 Which of the following are not the benefits of Cloud Computing?

a) Cloud computing provides optimum use of resources

b)Cloud computing provides higher degree of privacy and security over conventional methods

c) Cloud Computing reduces the cost of infrastructure for end users

d) All of the Above are benefits of Cloud Computing
 
Ans-[B]

Cloud Computing simply means the practice of using a network of remote servers hosted on the Internet to store, manage, and process data, rather than a local server or a personal computer.

An example would be using Dropbox , where all your information is saved remotely on the cloud and available from anywhere.

Cloud computing provides optimum use of resources. This is because unused resources such disk space, CPU etc are sold or provided in smaller units to large number of users.

Cloud computing provides higher degree of privacy and security over conventional methods is incorrect. The biggest issue with cloud computing is that since you do not own a separate server or resource but are merely sharing a part of the resource which is being shared with a large number of users, privacy concerns remain. Think of it like having your own office/flat, vs having a shared office/ shared flat with another organisation/people. Having one’s own office/flat offers more privacy as compared to having a shared office/flat.

Cloud Computing reduces the cost of infrastructure for end users is correct. You only pay for what you use and costs are brought down.

Hence option “b” is correct.

 

Q.5 Which of the following disease(s) are not communicable by sharing the body piercing needles?

1. Kala azar                          2. Dengue

3. Malaria                            4. AIDS

Select the correct answer using the codes given below:

a) 2 and 3 only

b) 1 and 3 only

c) 1, 2 and 3 only

d) 1, 2, 3 and 4
Ans-[A]

It is HIV that mainly is transmitted via the needle piercing. Rest other are transmitted through vectors. In case of Kala zar cases of transmssion through contaminated needles, blood transfusion and mother to child in womb has been seen.

Q.6 H5N1  virus is sometimes mentioned in the news with reference to which one of the following diseases?

a) Swine Flu

b) Bird flu

c) MERS

d) Zika virus
Ans-[B]
 Swine Flu

Swine influenza, also called pig influenza, swine flu, hog flu and pig flu, is an infection caused by any one of several types of swine influenza viruses. As of 2009, the known SIV strains include influenza C and the subtypes of influenza A known as H1N1, H1N2, H2N1, H3N1, H3N2, and H2N3.

Bird Flu

Influenza A virus subtype H5N1, is a subtype of the influenza A virus which can cause illness in humans and many other animal species.A bird-adapted strain of H5N1) for highly pathogenic avian influenza virus of type

A of subtype H5N1, is the highly pathogenic causative agent of H5N1 flu, commonly known as avian influenza (“bird flu”).

Zika Virus

Zika virus is a member of the virus family Flaviviridae and the genus Flavivirus. It is spread by daytime-active

Aedes mosquitoes.

The infection, known as Zika fever, often causes no or only mild symptoms, similar to a mild form of dengue Fever.

MERS

Middle East respiratory syndrome coronavirus (MERS-CoV)

Initially called novel coronavirus 2012 or simply novel coronavirus, it was first reported in 2012 after genome sequencing of a virus isolated from sputum samples from a person who fell ill in a 2012 outbreak of a new Flu.


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