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### HW6.sol

Course: PHY 303K, Fall 2007
School: University of Texas
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Word Count: 800

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06 homework RAHMAN, TARIQUE Due: Feb 13 2008, 3:00 am Question 1, chap 4, sect 5. part 1 of 1 10 points Consider the following situations. A) An object moves with uniform circular motion. B) An object travels as a projectile in a gravitational eld with negligible air resistance. C) An object moves in a straight line at constant speed. In which of the situations would the object be accelerated? 1. C only 2. A...

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06 homework RAHMAN, TARIQUE Due: Feb 13 2008, 3:00 am Question 1, chap 4, sect 5. part 1 of 1 10 points Consider the following situations. A) An object moves with uniform circular motion. B) An object travels as a projectile in a gravitational eld with negligible air resistance. C) An object moves in a straight line at constant speed. In which of the situations would the object be accelerated? 1. C only 2. A only 3. A and C only 4. B and C only 5. None exhibits acceleration. 6. B only 7. A and B only correct 8. All exhibit acceleration. Explanation: A) The direction of the velocity constantly changes; the centripetal acceleration is directed toward the center of the motion. B) The projectile undergoes gratitational acceleration. C) The velocity of the object (its direction and magnitude) is unchanged, so it is not accelerated. Question 2, chap 4, sect 5. part 1 of 1 10 points A satellite of mass M moves in a circular orbit of radius R with constant speed v . True statements about this satellite include which of the following? v I) Its angular speed is . R II) Its tangential acceleration is zero. Since ar = or v= ar d 2 1 III) The magnitude of its centripetal acceleration is constant. 1. II only 2. I, II, and III correct 3. I and III only 4. II and III only 5. I only Explanation: Here we will only list some facts of the circular orbital movement: v 1. The angular speed is = . R 2. The acceleration points to the center of v2 the circular orbit with magnitude = 2 R. R 3. The centripetal force is therefore the mass M times the acceleration. 2 R 2 4. The period is = . v Question 3, chap 4, sect 5. part 1 of 1 10 points A space station in the form of a large wheel, 227 m in diameter, rotates to provide an artif icial gravity of 6.7 m/s2 for people located at the outer rim. What is the frequency of the rotational motion for the wheel to produce this eect? Correct answer: 2.32012 rev/min (tolerance 1 %). Explanation: d = vt And the frequency (where T is the period) is f= 1 v = . T d 2 v2 v2 = r d homework 06 RAHMAN, TARIQUE Due: Feb 13 2008, 3:00 am Therefore, we have ar 2 2 d (6.7 m/s2 ) 60 sec 2 2 (227 m) 1 min v 2 f= = = 2.32012 rev/min . At the position shown in the gure, which of the labeled arrows best represents the direction of the acceleration of the mass? 1. Question 4, chap 4, sect 5. part 1 of 1 10 points A particle moves in the -plane xy with coordinates given by x = A cos t and y = A sin t , 2. 3. 4. The mass is traveling at a constant velocity, therefore it has no acceleration. 5. 6. where A = 1.5 meters and = 2.0 radians per second. What is the magnitude of the particles acceleration? 1. a = 0 m/s2 2. a = 3.0 m/s2 3. a = 4.5 m/s2 7. 8. 4. a = 1.3 m/s2 5. a = 6.0 m/s2 correct Explanation: From the expressions for x and y , it is easy to see that the particle moves on a circular orbit with a constant angular velocity and a radius of A. Therefore, the acceleration is a = 2 A = 6 m/s2 . Question 5, chap 4, sect 5. part 1 of 1 10 points A mass slides with negligible friction on a circular track of 1 m radius oriented vertically. Its speed at the position shown in the gure is 3.13 m/s. The acceleration of gravity is 9.8 m/s2 . 9. correct Explanation: The magnitude of the centripetal is v2 r (3.13 m/s)2 = 1m 9.8 m/s2 . ar = The centripetal acceleration is inward r . and gravity is down k homework 06 RAHMAN, TARIQUE Due: Feb 13 2008, 3:00 am ar a g 3 If the maximum value of T is 95.7 N, then we have (3.47 kg) v 2 95.7 N = . (0.465 m) From which, Question 6, chap 4, sect 5. part 1 of 3 10 points An athlete swings a 3.47 kg ball horizontally on the end of a rope. The ball moves in a circle of radius 0.465 m at an angular speed of 0.6 rev/s. What is the tangential speed of the ball? Correct answer: 1.75301 m/s (tolerance 1 %). Explanation: = 0.6 rev/s = 3.76991 rad/s . vt = r = (0.465 m) (3.76991 rad/s) = 1.75301 m/s . vmax = 3.58111 m/s . Question 9, chap 4, sect 5. part 1 of 1 10 points A turntable is designed to acquire an angular velocity of 44.5 rev/s in 0.7 s , starting from rest. Find the average angular acceleration of the turntable during the 0.7 s period. Correct answer: 399.431 rad/s2 (tolerance 1 %). Explanation: = 44.5 rev/s = 279.602 rad/s We have: t 279.602 rad/s = 0. 7 s = 399.431 rad/s2 . Question 7, chap 4, sect 5. part 2 of 3 10 points What is its centripetal acceleration? Correct answer: 6.6087 m/s2 (tolerance 1 %). Explanation: ar = r 2 = (0.465 m)(3.76991 rad/s)2 = 6.6087 m/s2 . = Question 8, chap 4, sect 5. part 3 of 3 10 points If the maximum tension the rope can withstand before breaking is 95.7 N, what is the maximum tangential speed the ball can have? Correct answer: 3.58111 m/s (tolerance 1 %). Explanation: m v2 . F= r
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University of Texas - PHY - 303K
homework 07 RAHMAN, TARIQUE Due: Feb 15 2008, 3:00 am part 1 of 1 Question 1, chap 5, sect 1. part 1 of 1 10 points An elevator is being lifted up an elevator shaft at a constant speed by a steel cable as shown in the gure below. All frictional eects are
University of Texas - PHY - 303K
homework 08 RAHMAN, TARIQUE Due: Feb 20 2008, 3:00 am Question 1, chap 6, sect 1. part 1 of 2 10 points A block of mass m is accelerated across a rough surface by a force of magnitude F that is exerted at an angle with the horizontal, as shown above. The
University of Texas - PHY - 303K
homework 09 RAHMAN, TARIQUE Due: Feb 25 2008, 3:00 am Question 1, chap 6, sect 1. part 1 of 1 10 points In order to slide a heavy desk across the oor at constant speed in a straight line, you have to exert a horizontal force of 500 Newtons. Compare the 50
University of Texas - PHY - 303K
homework 10 RAHMAN, TARIQUE Due: Feb 29 2008, 3:00 am Question 1, chap 7, sect 3. part 1 of 2 10 points If a golf ball and a ping-pong ball both move with the same kinetic energy, which has the greater speed? 1. Cannot be determined 2. the golf ball 3. th
University of Texas - PHY - 303K
homework 11 RAHMAN, TARIQUE Due: Mar 3 2008, 3:00 am Question 1, chap 8, sect 1. part 1 of 1 10 points A weight lifter lifts a mass m at constant speed to a height h in time t. How much work W is done by the weight lifter? 1. W = mgh t1dulum is E = 10 J
University of Texas - PHY - 303K
homework 12 RAHMAN, TARIQUE Due: Mar 4 2008, 9:00 pm Question 1, chap 9, sect 1. part 1 of 2 10 points A ball is tossed straight up from the surface of a small, spherical asteroid with no atmosphere. The ball rises to a height equal to the asteroids radiu
University of Texas - PHY - 303K
homework 13 RAHMAN, TARIQUE Due: Mar 21 2008, 3:00 am Question 1, chap 10, sect 1. part 1 of 2 10 points When the velocity of an object is doubled, by what factor is its momentum changed? 1. 4 2. 3 3. 2 correct 4. 1 Explanation: Momentum is proportional t
University of Texas - PHY - 303K
homework 14 RAHMAN, TARIQUE Due: Mar 26 2008, 3:00 am Question 1, chap 10, sect 2. part 1 of 2 10 points Three spherical masses are located in a plane at the positions shown in the gure below. A has mass 15.6 kg, B has mass 50.7 kg, and C has mass 46.7 kg
University of Texas - PHY - 303K
homework 15 RAHMAN, TARIQUE Due: Mar 29 2008, 3:00 am mb vb + 0 = (mb + mw ) vf Question 1, chap 11, sect 2. part 1 of 1 10 points Railroad car A rolls at a certain speed and makes a perfectly elastic collision with car B of the same mass. After the colli
University of Texas - PHY - 303K
homework 16 RAHMAN, TARIQUE Due: Mar 31 2008, 3:00 am Question 1, chap 12, sect 2. part 1 of 1 10 points A ladybug sits at the outer edge of a merrygo-round, and a gentleman bug sits halfway between her and the axis of rotation. The merry-go-round makes a
University of Texas - PHY - 303K
homework 17 RAHMAN, TARIQUE Due: Apr 2 2008, 3:00 am theorem, Question 1, chap 12, sect 5. part 1 of 1 10 points A circular disk, a ring, and a square, have the same mass M and width 2 r . ring disk square Idisk = Iring 1 1 m r2 = M r2 2 2 2 = m r = M r2
University of Texas - PHY - 303K
homework 18 RAHMAN, TARIQUE Due: Apr 7 2008, 3:00 am Question 1, chap 13, sect 3. part 1 of 1 10 points A solid cylinder of mass M = 29 kg, radius R = 0.22 m and uniform density is pivoted on a frictionless axle coaxial with its symmetry axis. A particle
University of Texas - PHY - 303K
homework 19 RAHMAN, TARIQUE Due: Apr 11 2008, 3:00 am Question 1, chap 14, sect 1. part 1 of 1 10 points Consider the wheel-and-axle system shown below. F 1RPb amg Determine the torque equation about the point P . m2 1. R m g = (1 + sin ) R F correct
University of Texas - PHY - 303K
homework 20 RAHMAN, TARIQUE Due: Apr 18 2008, 3:00 am Question 1, chap 14, sect 4. part 1 of 1 10 points A steel cable with a cross-sectional area of 1.5 cm2 has a mass of 2.95 kg/m . Its Youngs modulus is 1.27 1011 N/m2 . The acceleration of gravity is 9
University of Texas - PHY - 303K
homework 21 RAHMAN, TARIQUE Due: Apr 21 2008, 3:00 am Question 1, chap 15, sect 4. part 1 of 2 10 points1The sitar, an Indian musical instrument, has a set of strings that vibrate and produce music, even though they are never plucked by the player. Thes
University of Texas - PHY - 303K
homework 22 RAHMAN, TARIQUE Due: Apr 25 2008, 3:00 am Question 1, chap 16, sect 2. part 1 of 1 10 points Which requires a physical medium in which to travel? 1. sound correct 2. light 3. neither sound nor light 4. both sound and light Explanation: Sound r
University of Texas - PHY - 303K
homework 23 RAHMAN, TARIQUE Due: Apr 29 2008, 4:00 am Question 1, chap 17, sect 2. part 1 of 1 10 points Why can the tremor of the ground from a distant explosion be felt before the sound of the explosion can be heard? 1. The sound travels faster in the s
University of Texas - PHY - 303K
homework 24 RAHMAN, TARIQUE Due: May 3 2008, 3:00 am Question 1, chap 18, sect 2. part 1 of 2 10 points The aorta in an average adult has a crosssectional area of 2.0 cm2 . a) Calculate the ow rate (in grams per second) of blood ( = 1.0 g/cm3 ) in the aor
University of Texas - PHY - 303K
midterm 01 RAHMAN, TARIQUE Due: Feb 14 2008, 4:00 am1Mechanics - Basic Physical ConceptsMath: Circle: 2 r, r2 ; Sphere: 4 r2 , (4/ r3 3) b2 Quadratic Eq.: a x2 + b x + c = 0, x = b 2 a4 a cCartesian and polar coordinates: y x = r cos , y = r sin , r2
University of Texas - PHY - 303K
midterm 02 RAHMAN, TARIQUE Due: Mar 6 2008, 4:00 am1Mechanics - Basic Physical ConceptsMath: Circle: 2 r, r2 ; Sphere: 4 r2 , (4/ r3 3) b2 Quadratic Eq.: a x2 + b x + c = 0, x = b 2 a4 a cCartesian and polar coordinates: y x = r cos , y = r sin , r2 =
University of Texas - PHY - 303K
midterm 03 RAHMAN, TARIQUE Due: Apr 3 2008, 1:00 am1Mechanics - Basic Physical ConceptsMath: Circle: 2 r, r2 ; Sphere: 4 r2 , (4/ r3 3) b2 Quadratic Eq.: a x2 + b x + c = 0, x = b 2 a4 a cCartesian and polar coordinates: y x = r cos , y = r sin , r2 =
University of Texas - PHY - 303K
midterm 04 RAHMAN, TARIQUE Due: May 1 2008, 1:00 am1Mechanics - Basic Physical ConceptsMath: Circle: 2 r, r2 ; Sphere: 4 r2 , (4/ r3 3) b2 Quadratic Eq.: a x2 + b x + c = 0, x = b 2 a4 a cCartesian and polar coordinates: y x = r cos , y = r sin , r2 =
University of Texas - PHY - 303K
homework 01 RAHMAN, TARIQUE Due: Jan 25 2008, 3:00 am Question 1, chap 1, sect 6. part 1 of 1 10 points A certain force is given by the equation F = KM L2 /T 4 , where M is a mass, L is a length, T is a time and where K is a constant. What are units of th
University of Texas - PHY - 303K
homework 02 RAHMAN, TARIQUE Due: Jan 30 2008, 3:00 am Question 1, chap 3, sect 1. part 1 of 1 10 points Which of the following are scalar quantities, which are vector quantities? a) velocity. b) age. c) speed. d) acceleration. e) temperature. 1. Vectors:
University of Texas - PHY - 303K
homework 03 RAHMAN, TARIQUE Due: Feb 4 2008, 3:00 am Answer in units of s. Question 1, chap 2, sect 6. part 1 of 1 10 points A toy rocket, launched from the ground, rises vertically with an acceleration of 20 m/s2 for 9.3 s until its motor stops. The acce
University of Texas - PHY - 303K
homework 04 RAHMAN, TARIQUE Due: Feb 6 2008, 3:00 am Question 1, chap 4, sect 1. part 1 of 1 10 points Suppose that three balls are rolled simultaneously from the top of a hill along the slopes as shown below. 1 2 31be falling vertically with a speed v2
University of Texas - PHY - 303K
homework 05 RAHMAN, TARIQUE Due: Feb 11 2008, 3:00 am Question 1, chap 4, sect 4. part 1 of 1 10 points A ball is thrown and follows the parabolic path shown. Air friction is negligible. Point Q is the highest point on the path. Points P and R are the sam
University of Texas - PHY - 303K
homework 06 RAHMAN, TARIQUE Due: Feb 13 2008, 3:00 am 4. II and III only Question 1, chap 4, sect 5. part 1 of 1 10 points Consider the following situations. A) An object moves with uniform circular motion. B) An object travels as a projectile in a gravit
University of Texas - PHY - 303K
homework 07 RAHMAN, TARIQUE Due: Feb 15 2008, 3:00 am Question 1, chap 5, sect 1. part 1 of 1 10 points An elevator is being lifted up an elevator shaft at a constant speed by a steel cable as shown in the gure below. All frictional eects are negligible.
University of Texas - PHY - 303K
homework 08 RAHMAN, TARIQUE Due: Feb 20 2008, 3:00 am Question 1, chap 6, sect 1. part 1 of 2 10 points A block of mass m is accelerated across a rough surface by a force of magnitude F that is exerted at an angle with the horizontal, as shown above. The
University of Texas - PHY - 303K
homework 09 RAHMAN, TARIQUE Due: Feb 25 2008, 3:00 am Question 1, chap 6, sect 1. part 1 of 1 10 points In order to slide a heavy desk across the oor at constant speed in a straight line, you have to exert a horizontal force of 500 Newtons. Compare the 50
University of Texas - PHY - 303K
homework 10 RAHMAN, TARIQUE Due: Feb 29 2008, 3:00 am Question 1, chap 7, sect 3. part 1 of 2 10 points If a golf ball and a ping-pong ball both move with the same kinetic energy, which has the greater speed? 1. Cannot be determined 2. the golf ball 3. th
University of Texas - PHY - 303K
homework 11 RAHMAN, TARIQUE Due: Mar 3 2008, 3:00 am Question 1, chap 8, sect 1. part 1 of 1 10 points A weight lifter lifts a mass m at constant speed to a height h in time t. How much work W is done by the weight lifter? mgh 1. W = t 2. W = m g h t 3. W
University of Texas - PHY - 303K
homework 12 RAHMAN, TARIQUE Due: Mar 4 2008, 9:00 pm Question 1, chap 9, sect 1. part 1 of 2 10 points A ball is tossed straight up from the surface of a small, spherical asteroid with no atmosphere. The ball rises to a height equal to the asteroids radiu
University of Texas - PHY - 303K
homework 20 RAHMAN, TARIQUE Due: Apr 18 2008, 3:00 am Question 1, chap 14, sect 4. part 1 of 1 10 points A steel cable with a cross-sectional area of 1.5 cm2 has a mass of 2.95 kg/m . Its Youngs modulus is 1.27 1011 N/m2 . The acceleration of gravity is 9
University of Texas - PHY - 303K
homework 21 RAHMAN, TARIQUE Due: Apr 21 2008, 3:00 am 4. The lower strings are plucked by a ghost. Question 1, chap 15, sect 4. part 1 of 2 10 points Question 4, chap 15, sect 5. part 1 of 1 10 points1rIf the handle of a tuning fork is held solidly aga
University of Texas - PHY - 303K
homework 22 RAHMAN, TARIQUE Due: Apr 25 2008, 3:00 am Question 1, chap 16, sect 2. part 1 of 1 10 points Which requires a physical medium in which to travel? 1. sound 2. light 3. neither sound nor light 4. both sound and light Question 2, chap 16, sect 2.
University of Texas - PHY - 303K
List midterm02 - Mar 06 2006 in class PHY 303K-Florin-Spring 2008. Question 1, chap 6, sect 3. part 1 of 1 0 points Barrel of Fun 05 (599) An amusement park ride consists of a large vertical cylinder that spins about its axis fast enough that any person i
University of Texas - PHY - 303K
List midterm02 - Mar 06 2006 in class PHY 303K-Florin-Spring 2008. Question 1, chap 6, sect 3. part 1 of 1 0 points Barrel of Fun 05 (599) An amusement park ride consists of a large vertical cylinder that spins about its axis fast enough that any person i
University of Texas - CH - 301
Rahman, Tarique Homework 2 Due: Sep 13 2007, midnight Inst: Vandenbout This print-out should have 17 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Heres the rst
University of Texas - CH - 301
Rahman, Tarique Homework 3 Due: Sep 18 2007, midnight Inst: Vandenbout This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. This homework
University of Texas - CH - 301
Rahman, Tarique Homework 4 Due: Sep 25 2007, midnight Inst: Vandenbout This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. This homework
University of Texas - CH - 301
Rahman, Tarique Homework 5 Due: Oct 2 2007, midnight Inst: Vandenbout 12. E(SO4 )26 5 510. None of these Explanation:H1. Ca +I+I+ICa gives up two electrons to form the Ca2+HGG003 (part 1 of 1) 10 points Use electron-dot notation to demonst
University of Texas - CH - 301
Rahman, Tarique Homework 6 Due: Oct 9 2007, midnight Inst: Vandenbout This print-out should have 23 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Here are more q
University of Texas - CH - 301
Rahman, Tarique Homework 7 Due: Oct 16 2007, midnight Inst: Vandenbout This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Here are more
University of Texas - CH - 301
Rahman, Tarique Homework 8 Due: Oct 31 2007, midnight Inst: Vandenbout This print-out should have 33 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. 001 (part 1 of
University of Texas - CH - 301
Rahman, Tarique Homework 9 Due: Nov 6 2007, midnight Inst: Vandenbout This print-out should have 23 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Room Assignment
University of Texas - CH - 301
1A11Periodic Table of the Elements2A28A181.0079H3A134A145A156A167A1724.0026He36.941Li49.0122Be510.811B612.011C714.0067N P815.9994O S918.9984F1020.1797Ne Ar1122.9898Na K1224.3050Mg Ca Sr3B34B45B56B
University of Texas - CH - 301
Martin, Robert Homework 2 Due: Jan 25 2007, 5:00 pm Inst: Deb Walker This print-out should have 29 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Thermo Review 00
University of Texas - CH - 301
University of Texas - CH - 301
McCord/Vanden BoutCHAPTER 5Exam 3 Review TopicsFall 2007Chapter 5 Which Sections for the Exam?Chapter 5: All sections except sections 5.9 and 5.11 were covered. Section 11 is an interesting section on atmospheric chemistry.P1V1 P2V2 = (assuming cons
University of Texas - CH - 301
Pietzsch, Ashley Exam 3 Due: Nov 9 2006, noon Inst: Brodbelt This print-out should have 23 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Exam 3. You must ll in y
University of Texas - CH - 301
University of Texas - CH - 301
University of Texas - CH - 301
University of Texas - CH - 301
University of Texas - CH - 301
Livasy, David Exam 3 Due: Oct 27 2006, 5:00 pm Inst: Donna C Lyon This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. 001 (part 1 of 1) 1
University of Texas - CH - 301
Have your notes readyLiquids and Solids Liquids= intermolecular forces limit the range of motion of the moleculesCharacteristics Density and compressibility =density much higher than gas, with huge pressure can be compressedCharacteristics Fluidity
University of Texas - CH - 301
Chapter 14Gases A. Kinetic Theory Gas Particles do not attract or repel each other Gas particles are much smaller than distances between themKinetic Theory Gas particles are in constant random motion No kinetic energy is lost when gas particles colli
University of Texas - CH - 301
CrystallineSolidsCrystal=particlesarearrangedinan orderly,geometricrepeatingpatternAmorphoussolidParticlesarearrangedinarandom manner SometimescalledsupercooledliquidsMeltingPointChangeofasolidtoaliquidbythe additionofheat. Temperaturethatthishappens
University of Texas - CH - 301
Physical Characteristics of Gases =chapter 10 pg 303Kinetic Theory = describes the motion of particles and attempts to explain why gas laws are true. This theory is based on the fact that particles of matter are always in motion.Ideal Gas = imaginary g