GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 26 Sep 2018, 07:50

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

The element ytterbium increases its electrical resistance when subject

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Retired Moderator
User avatar
Joined: 06 Jul 2014
Posts: 1244
Location: Ukraine
Concentration: Entrepreneurship, Technology
GMAT 1: 660 Q48 V33
GMAT 2: 740 Q50 V40
GMAT ToolKit User Premium Member
The element ytterbium increases its electrical resistance when subject  [#permalink]

Show Tags

New post 31 Aug 2015, 05:49
3
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

80% (01:42) correct 20% (02:14) wrong based on 361 sessions

HideShow timer Statistics

The element ytterbium increases its electrical resistance when subject to high mechanical stresses. This property has made it an indispensable component in a medical tool designed to measure the stress on bones, which can guide physicians in setting broken bones. Unfortunately, ytterbium is rare, found in only a few meager sources around the world. A steep market demand will cause the price to skyrocket, and this technology so helpful to physicians will become unaffordable.

Which of the following, if true, most seriously weakens the argument above?

A) Just one mining company controls all the ytterbium that is imported into the United States, where these medical tools are manufactured.
B) The process of extracting pure ytterbium from its ores, euxenite and xenotime, is very expensive and involves strong acids.
C) Ytterbium is also used as an additive, in small quantities, to stainless steel and solid-state lasers.
D) Some common alloys of tin also increase their electrical resistance under mechanical loads.
E) The largest source of ytterbium is in a relatively remote region of China.

_________________

Simple way to always control time during the quant part.
How to solve main idea questions without full understanding of RC.
660 (Q48, V33) - unpleasant surprise
740 (Q50, V40, IR3) - anti-debrief ;)

Manager
Manager
User avatar
Joined: 17 Jun 2015
Posts: 228
GMAT 1: 540 Q39 V26
GMAT 2: 680 Q46 V37
GMAT ToolKit User
Re: The element ytterbium increases its electrical resistance when subject  [#permalink]

Show Tags

New post 31 Aug 2015, 06:04
My approach:

Explaining the argument to myself:

There is an element Y. It's electrical res decreases as mechanical stress increases. This could be helpful when used for some bone related stuff by physicians. But Y is rare. Increase in demand, less supply would increase the prices. Thus, physicians would not be able to afford the device made of Y

Explaining the Question: Find an options that breaks this argument


Which of the following, if true, most seriously weakens the argument above?

A) Just one mining company controls all the ytterbium that is imported into the United States, where these medical tools are manufactured.
This adds to the rare part and strengthens the argument.

B) The process of extracting pure ytterbium from its ores, euxenite and xenotime, is very expensive and involves strong acids.
This makes Y more expensive and strengthens the argument.

C) Ytterbium is also used as an additive, in small quantities, to stainless steel and solid-state lasers.
So what? Out of Scope

D) Some common alloys of tin also increase their electrical resistance under mechanical loads.
There might be a cheaper replacement for Y. This, in a way, discards the need for Y. Correct choice

E) The largest source of ytterbium is in a relatively remote region of China.
strengthens the argument


hence D
_________________

Fais de ta vie un rêve et d'un rêve une réalité

Board of Directors
User avatar
P
Joined: 17 Jul 2014
Posts: 2682
Location: United States (IL)
Concentration: Finance, Economics
GMAT 1: 650 Q49 V30
GPA: 3.92
WE: General Management (Transportation)
GMAT ToolKit User Premium Member Reviews Badge
The element ytterbium increases its electrical resistance when subject  [#permalink]

Show Tags

New post 14 Nov 2015, 14:18
agree that D is the correct answer:

A) Just one mining company controls all the ytterbium that is imported into the United States, where these medical tools are manufactured.
if only one company controls the Y -> and demand is increasing, most likely the price will skyrocket and thus the tools will become inaccessible
B) The process of extracting pure ytterbium from its ores, euxenite and xenotime, is very expensive and involves strong acids.
since the process is expensive and demand is increasing, the prices will go up undoubtedly, and since the price are huge, the price for manufacturing the technology will increase respectively.

C) Ytterbium is also used as an additive, in small quantities, to stainless steel and solid-state lasers.
this only shows that the demand for Y will increase, thus the prices will increase.

D) Some common alloys of tin also increase their electrical resistance under mechanical loads.
if something else has the same result, then why not substitute Y?

E) The largest source of ytterbium is in a relatively remote region of China.
if it's in remote region of China, then the price to extract, and transport Y is huge.
SVP
SVP
avatar
P
Joined: 12 Dec 2016
Posts: 1781
Location: United States
GMAT 1: 700 Q49 V33
GPA: 3.64
GMAT ToolKit User Premium Member
Re: The element ytterbium increases its electrical resistance when subject  [#permalink]

Show Tags

New post 19 Apr 2017, 17:16
somehow, I find stuck with this question. I chose B over D.
First, according to kaplan gmat method, ones can find a choice that weakens the argument if the choice offers alternative explanation, and B gives the information.
D is still not clear if tin is actual common resources.
Verbal Forum Moderator
User avatar
V
Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 2101
Location: India
Concentration: General Management, Strategy
Schools: Kelley '20, ISB '19
GPA: 3.2
WE: Information Technology (Consulting)
GMAT ToolKit User Reviews Badge CAT Tests
Re: The element ytterbium increases its electrical resistance when subject  [#permalink]

Show Tags

New post 07 Dec 2017, 10:52
The element ytterbium increases its electrical resistance when subject to high mechanical stresses. This property has made it an indispensable component in a medical tool designed to measure the stress on bones, which can guide physicians in setting broken bones. Unfortunately, ytterbium is rare, found in only a few meager sources around the world. A steep market demand will cause the price to skyrocket, and this technology so helpful to physicians will become unaffordable.

Type - weaken
Boil it down - Element Y because of its electrical resistance property is used in medical devices .
- Y is rare
- Steep demand will cause price of Y to skyrocket and this tech will become unaffordable.



A) Just one mining company controls all the ytterbium that is imported into the United States, where these medical tools are manufactured. -- Strengthener -- it's kind of a monopoly
B) The process of extracting pure ytterbium from its ores, euxenite and xenotime, is very expensive and involves strong acids. -- Strengthener
C) Ytterbium is also used as an additive, in small quantities, to stainless steel and solid-state lasers. -- incorrect -- a mild strengthener -- > more demand for Y
D) Some common alloys of tin also increase their electrical resistance under mechanical loads. - Correct -- we have a substitute for element Y
E) The largest source of ytterbium is in a relatively remote region of China. -- Strengthener -- it only supports that Y is rare

Answer D
_________________

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it. - Henry Ford
The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long
+1 Kudos if you find this post helpful

Intern
Intern
avatar
B
Joined: 26 Sep 2016
Posts: 23
Location: India
Schools: XLRI
GMAT 1: 580 Q48 V19
GMAT ToolKit User
The element ytterbium increases its electrical resistance when subject  [#permalink]

Show Tags

New post 14 Jan 2018, 10:29
Conc :- this technology so helpful to physicians will become unaffordable.

Aim :- Weaken the conclusion.

Prethink Assumption :- No substitute, abundant in nature, will be substituted for Y.

Neg the assumption :- Some substitute is likely to replace.

Option D -
:-)
GMAT Club Bot
The element ytterbium increases its electrical resistance when subject &nbs [#permalink] 14 Jan 2018, 10:29
Display posts from previous: Sort by

The element ytterbium increases its electrical resistance when subject

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.