This document contains 20 multiple choice questions from a PHYS 102 exam covering topics in thermodynamics, waves, sound, and heat transfer. The questions require calculations of things like changes in internal energy during an expansion process, wave frequencies from moving sources, and properties of standing waves. Answer choices with the correct response are also provided for each question.
HEAT TRANSFER : STEADY STATE HEAT CONDUCTION NUMERICALS part3PRAMOD MAURYA
NUMERICAL SOLUTION FROM MUMBAI UNIVERSITY QUESTION PAPERS
.An electric cable of 20 mm diameter is insulated with rubber, which is exposed to atmosphere at 30°C. Calculate the most economical thickness of rubber insulation (k = 0.175 W/m.K). When cable surface temperature with and without insulation is at 70°C. Also calculate the percentage increase in heat dissipation and current carrying capacity when most economical thickness is provided. Take heat transfer coefficient, h = 9.3 W/m2.K.
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HEAT TRANSFER : STEADY STATE HEAT CONDUCTION NUMERICALS part3PRAMOD MAURYA
NUMERICAL SOLUTION FROM MUMBAI UNIVERSITY QUESTION PAPERS
.An electric cable of 20 mm diameter is insulated with rubber, which is exposed to atmosphere at 30°C. Calculate the most economical thickness of rubber insulation (k = 0.175 W/m.K). When cable surface temperature with and without insulation is at 70°C. Also calculate the percentage increase in heat dissipation and current carrying capacity when most economical thickness is provided. Take heat transfer coefficient, h = 9.3 W/m2.K.
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1. (TCO 4) For the series-parallel circuit given in Figure 3.1 below, determine the total resistance RT between the terminals labeled A and B
2. (TCO 4) For the circuit given in Figure 3.3, obtain the following quantities.
a) Currents I1 and I2
b) Power dissipated by the resistor R3
3. (TCOs 2,3,4) Determine the unknown quantities I1, V2, and V3
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A Discussion on Impulse Breakdown and Discharge Propagation Mechanisms in AirNirmalya Basu
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1. (TCO 4) For the series-parallel circuit given in Figure 3.1 below, determine the total resistance RT between the terminals labeled A and B
2. (TCO 4) For the circuit given in Figure 3.3, obtain the following quantities.
a) Currents I1 and I2
b) Power dissipated by the resistor R3
3. (TCOs 2,3,4) Determine the unknown quantities I1, V2, and V3
www.entranceindia.com provides JEE Main 2015 model papers including all subjects such as Physics, Chemistry, Mathematics along with their Sample papers, Practice Test Series and Past exam papers in online as well as DVD mode. For more information about jee main 2015 please visit our site www.entranceindia.com
This is perrys handbook for chemical engineering students. It contains all the information that chemic engineer needs in his entire life of engineering field.
A Discussion on Impulse Breakdown and Discharge Propagation Mechanisms in AirNirmalya Basu
This article presents a discussion on impulse breakdown and discharge propagation mechanisms under non-uniform electric fields in air. It describes experiments that have been conducted to obtain clarity on these mechanisms and also presents certain observations on these mechanisms.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
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• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
Exam1 011
1. PHYS 102 – FIRST MAJOR EXAM – TERM 011
*********************************************************************
QUESTION NO: 1
*****************
A diatomic ideal gas, at a pressure of 1.0 atm, expands
isotropically from a volume of 2.0 Liters to a volume of
5.0 Liters. Calculate the change in internal energy of
the gas during the process.
A. -3.1*10**2 J.
B. 1.1*10**3 J.
C. -9.0*10**3 J.
D. 1.7*10**3 J.
E. 7.6*10**2 J.
*********************************************************************
QUESTION NO: 2
*****************
A police car is approaching a stationary observer at 34.0 m/s
with its siren emitting a frequency of 450 Hz. What is the
frequency heard by the observer?
[Speed of sound in air = 343 m/s].
A. 500 Hz.
B. 485 Hz.
C. 405 Hz.
D. 525 Hz.
E. 475 Hz.
*********************************************************************
QUESTION NO: 3
*****************
Which of the following statements are CORRECT:
1. The first law of thermodynamics represents the conservation
of energy.
2. Room temperature is about 20 degrees on the Kelvin scale.
3. A calorie is approximately 4.2 J.
4. Heat has the same units as work.
5. Heat is a temperature difference.
A. 2 and 4.
B .1 , 3 , and 4 .
C .1 , 2 and 3 .
D. 3 and 5.
E. 1 and 5.
*********************************************************************
QUESTION NO: 4
*****************
A 1.5*10**(-6) W point source emits sound waves isotropically.
What is the sound level 2.5 m from the source?
A. 30 dB.
B. 39 dB.
C. 55 dB.
D. 16 dB.
E. 43 dB.
2. QUESTION NO: 5
*****************
A string under a tension of 15 N, is set into vibration to
produce a wave of speed 20 m/s, and a maximum transverse speed
of 8 m/s. For this wave, the average power is:
A. 44 W.
B. 11 W.
C. 30 W.
D. 15 W.
E. 24 w.
**********************************************************************
QUESTION NO: 6
*****************
A tube 1.5 m long is closed at one end. A stretched wire is
placed near the open end, see Fig. (1). The wire is 0.33 m long
and has a mass of 9.8 g. It is fixed at both ends and vibrates
in its fundamental mode. By resonance, it sets the air column
in the tube into oscillation at that column's fundamental
frequency. Find the tension in the wire.
[Speed of sound in air = 343 m/s].
A. 30 N.
B. 77 N.
C. 98 N.
D. 42 N.
E. 64 N.
*********************************************************************
QUESTION NO: 7
*****************
The coefficient of linear expansion of gold is 14.20*10**(-6)/K.
If the density of gold is 19.30 g/cm**3 at 20 degrees Celsius,
the density of gold at 90 degrees Celsius will be:
A. 19.34 g/cm**3.
B. 19.00 g/cm**3.
C. 19.24 g/cm**3.
D. 19.38 g/cm**3.
E. 19.28 g/cm**3.
**********************************************************************
QUESTION NO: 8
*****************
The resultant wave of two interfering waves moving in the
same direction is given by:
y(x.t) = 10.0*cos(Pi/6)*sin(3.0*x + 20*Pi*t + Pi/6).
One of the two originally interfering waves could be:
A. y(x.t) = 10.0 sin(3.0*x + 20*Pi*t).
B. y(x.t) = 5.0 sin(3.0*x + 20*Pi*t + Pi/3).
C. y(x.t) = 10.0 sin(3.0*x + 20*Pi*t + Pi/3).
D. y(x,t) = 5.0 sin(3.0*x + 20*Pi*t + Pi/6).
E. y(x,t) = 10.0 sin(3.0*x -20*Pi*t).
3. QUESTION NO: 9
*****************
Which of the following statements is CORRECT for a gas
undergoing an adiabatic process:
A. The internal energy of the gas is always zero.
B. The pressure of the gas remains constant.
C. There is no heat exchange between the gas and its environment.
D. The temperature of the gas remains constant.
E. The volume of the gas remains constant.
**********************************************************************
QUESTION NO: 10
*****************
A wave on a string is reflected from a fixed end. The reflected
wave:
A. has a larger speed than the original wave.
B. has a larger amplitude than the original wave.
C. cannot be transverse.
D. is in phase with the original wave at the fixed end.
E. is 180 degrees out of phase with the original wave at the
fixed end.
**********************************************************************
QUESTION NO: 11
*****************
The maximum pressure amplitude that the human ear can
tolerate in loud sounds is 28 Pa. What is the displacement
amplitude for such a sound in air of density 1.21 kg/m**3
at a frequency of 5.0*10**3 Hz?
[speed of sound in air = 343 m/s].
A. 50.5*10**(-6) m.
B. 8.30*10**(-6) m.
C. 2.15*10**(-6) m.
D. 11.0*10**(-6) m.
E. 4.15*10**(-6) m.
**********************************************************************
QUESTION NO: 12
*****************
Two identical containers, one has 2.0 moles of type 1 molecules,
of mass m1, at 20 degrees Celsius. The other has 2.0 moles of
type 2 molecules, of mass m2 = 2*m1, at 20 degrees Celsius.
The ratio between the average translational kinetic energy of
type 2 to that of type 1 is:
A. 8.
B. 1.
C. 2.
D. 4.
E. 16.
4. QUESTION NO: 13
*****************
Standing waves are produced in a string at the two consecutive
resonant frequencies 155 and 195 Hz. If the mass of the string
is 5.00 g and its length is 0.80 m, then the tension applied to
the string should be:
A. 19.0 H.
B. 17.2 H.
C. 28.5 H.
D. 25.6 H.
E. 6.4 H.
**********************************************************************
QUESTION NO: 14
*****************
A thermometer, of mass 0.06 kg and specific heat 836 J/(kg K),
reads 15 degrees Celsius. It is then completely immersed in
0.15 kg of water of specific heat 4180 J/(kg K). The final
temperature reading of the thermometer in the water is
45 degrees Celsius. Assuming no heat losses from the system to
the surrounding, the initial temperature of the water was:
A. 47.4 degrees Celsius.
B. 15.4 degrees Celsius.
C. 50.4 degrees Celsius.
D. 35.1 degrees Celsius.
E. 42.6 degrees Celsius.
**********************************************************************
QUESTION NO: 15
*****************
One mole of an ideal gas is taken through the cyclic process
ABCA as shown in Fig. (2). What is the net heat transfer
during the cycle?
A. 2.0*10*3 J.
B. -2.0*10*3 J.
C. -1.0*10*3 J.
D. 5.0*10*3 J.
E. 1.0*10*3 J.
**********************************************************************
QUESTION NO: 16
*****************
Two sound waves, from two different sources with the same
frequency, 660 Hz, travel at a speed of 330 m/s. The sources
are in phase. What is the phase difference of the waves at
a point that is 5.0 m from one source and 4.0 m from the
other? (The waves are traveling in the same direction. )
A. 4 Pi.
B. 5 Pi.
c. 1 Pi.
D. 2 Pi.
E. 3 Pi.
5. QUESTION NO: 17
*****************
A traveling wave is given by:
y(x,t) = 6.0*cos[0.63*x + 25.1*t) ],
where x and y are in cm and t is in seconds. It interferes with
a similar wave propagating in the opposite direction to produce
a standing wave. The distance between the node and the
consecutive antinode is:
A .2 .5 cm .
B .5 .O cm .
C. 1.0 cm.
D .7 .9 cm .
E. 0.5 cm.
**********************************************************************
QUESTION NO: 18
*****************
Sound waves
A. are matter waves.
B. are transverse waves.
C. travel at the same speed in all media.
D. are mechanical waves.
E. are electromagnetic waves.
*********************************************************************
QUESTION NO: 19
*****************
By what factor does the rate of radiant emission of heat, from
a heating element, increases when the temperature of a heating
element increases from 27 degrees Celsius to 327 degrees
Celsius?
A. 8.
B. 16.
C. 2.
D. 64.
E. 4.
***************************************************************
QUESTION NO: 20
*****************
A closed cubical box (60 cm on edge and 5 cm on thickness)
contains ice at zero degrees Celsius. When the outside
temperature is 20 degrees Celsius, it is found that 250 grams
of ice melt each hour. What is the value of the thermal
conductivity of the walls of the box?
A. 0.07 Watts/(m*K).
B. 0.01 Watts/(m*K).
C. 1.02 Watts/(m*K).
D. 0.03 Watts/(m*K).
E. 3.21 Watts/(m*K).