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phys101 |final |prep |ivy |tech |shah |questions |with
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A |thin |rod |of |mass |2.0 |kg |and |length |1.5 |m |is |rotated |about |an | axis |through |one |end |point |with |a |constant |angular |velocity |of |3.0 | rev/s. |Its |angular |momentum |is |____. |- |CORRECT |ANSWERS |✔✔ 28 | kgm2/s A |circular |grinding |disk |of |radius |0.5 |ft |has |a |moment |of |inertia |of | 16 |slugft2 |and |is |rotating |at | 600 |rpm. |The |frictional |force |applied |to |the |edge |of |the |disk |to |stop |the |wheel |in | 10 |s, |is |approximately | ____. |- |CORRECT |ANSWERS |✔✔ 201 |lb A |car |is |traveling |at |a |constant |speed |of | 25 |m/s |around |a |curve |of | radius | 75 |m. |What |is |the |translational |acceleration |of |the |car? |- | CORRECT |ANSWERS |✔✔ 0 If |the |sum |of |the |external |torques |acting |on |a |body |or |system |of | bodies |is |zero, |the |angular |momentum |is |also |zero. |- |CORRECT | ANSWERS |✔✔False Both |angular |acceleration |and |tangential |acceleration |represent |a | rate |of |change |in |angular |velocity. |- |CORRECT |ANSWERS |✔✔False
Usually |the |shearing |strain |can |be |approximated |by |the |tangent |of | the |shearing |angle. |- |CORRECT |ANSWERS |✔✔True A |material |having |a |large |spring |constant |will |experience |a |greater | change |in |length |for |a |given |applied |force |than |a |material |with |a | small |spring |constant. |- |CORRECT |ANSWERS |✔✔False A |unit |for |strain |is |the |__ |- |CORRECT |ANSWERS |✔✔radian The |smaller |the |bulk |modulus |of |a |material, |the |higher |its | compressibility. |- |CORRECT |ANSWERS |✔✔True A |mechanical |press |contains | 2 |m3 |of |oil |(B |= | 1700 |MPa). |If |the | volume |of |the |oil |decreases |by | 2 |× |10-8 |m3, |the |applied |pressure | must |be |approximately |____. |- |CORRECT |ANSWERS |✔✔ 17 |Pa According |to |Pascal's |principle, |any |change |in |external |pressure |on | a |confined |fluid |____. |- |CORRECT |ANSWERS |✔✔Is |transmitted | unchanged |through |the |fluid Which |of |the |following |is |independent |of |the |density |of |a |liquid? |- | CORRECT |ANSWERS |✔✔The |pressure |at |the |surface |of |the |liquid
2.00 |L |of |an |unknown |fluid |are |in |a |2.00 |L |glass |beaker. |If |the | temperature |of |the |fluid |increases |by |60.0oC, |25.0 |mL |overflows. | Neglecting |any |expansion |of |the |glass, |what |is |the |coefficient |of | volume |expansion |of |the |liquid? |- |CORRECT |ANSWERS |✔✔2.08 |× |10- 4 |/Co A |copper |cylinder |conducts |heat |at |a |rate |of | 25 |W. |Another |copper | rod |that |is |twice |as |long |and |has |twice |the |diameter |as |the |first | will |conduct |heat |at |a |rate |of |____. |- |CORRECT |ANSWERS |✔✔ 50 |W You |are |standing |on |the |beach. |The |transfer |of |heat |you |feel |due | to |a |cool |breeze |is |due |to |- |CORRECT |ANSWERS |✔✔convection When |a |radiator |is |used |to |heat |a |room, |the |principal |method |of | heat |transfer |warming |the |room |is |convection. |- |CORRECT | ANSWERS |✔✔True The |thermal |conductivity |of |a |plate |is |0.01 |kcal/sm2C°. |The |plate |is | 2 |cm |thick |and |has |a |cross-section |of | 4000 |cm2. |If |one |side |is |at | 150°C |and |the |other |at |50°C, |the |number |of |kilocalories | transferred |every |second |is |approximately |____. |- |CORRECT |ANSWERS |✔✔ 20 |kcal
You |are |standing |on |the |beach. |The |heat |transfer |due |to |the |sun | is |due |to |- |CORRECT |ANSWERS |✔✔radiation While |condensing |from |a |gas |to |a |liquid |at |78.5oC, |45.0 |g |of |ethyl | alcohol |releases |38.4 |kJ |of |heat. |What |is |the |heat |of |vaporization |of | ethyl |alcohol? |- |CORRECT |ANSWERS |✔✔ 853 |kJ/kg The |quantity |of |heat |required |to |convert | 10 |g |of |ice |at |0°C |to | steam |at |100°C |is |____. |- |CORRECT |ANSWERS |✔✔ 7200 |cal How |many |calories |are |there |in | 1 |kW |. |hr? |- |CORRECT |ANSWERS | ✔✔8.6 |× | 105 |cal The |specific |heat |of |any |material |is |the |same |numerically |in |either | the |metric |or |British |system |of |units. |- |CORRECT |ANSWERS |✔✔True Sublimation |is |the |process |of |going |directly |from |a |solid |to |a |gas. |- | CORRECT |ANSWERS |✔✔True One |mole |of |carbon |dioxide |(CO2) |has |the |same |amount |of | molecules |as |one |mole |of |carbon |monoxide |(CO). |- |CORRECT | ANSWERS |✔✔True
Without |the |aid |of |friction, |how |fast |can |a |car |travel |around |a |45.0 | m |radius |circle |banked |at |20.0o? |- |CORRECT |ANSWERS |✔✔12.7 |m/s According |to |Newton's |law |of |universal |gravitation, |the |force |of | attraction |between |any |two |masses |is |directly |proportional |to | ____. |- |CORRECT |ANSWERS |✔✔The |product |of |the |two |masses A |metal |string |of |mass | 250 |g |and |length | 25 |cm |is |under |a |tension | of | 400 |N. |The |fundamental |frequency |for |this |string |is |____. |- | CORRECT |ANSWERS |✔✔ 400 |Hz Two |waves |have |the |same |amplitude |and |frequency. |If |they |meet |at |the |same |time |and |place, |there |will |always |be |constructive | interference. |- |CORRECT |ANSWERS |✔✔False In |a |longitudinal |wave, |the |wavelength |is |equal |to |the |distance | between |adjacent |condensations |or |between |adjacent | rarefactions. |- |CORRECT |ANSWERS |✔✔True The |superposition |principle |applies |only |for |transverse |waves. |- | CORRECT |ANSWERS |✔✔False A |string |vibrates |with |standing |waves. |If |the |tension |is |doubled, | which |of |the |following |does |NOT |change? |- |CORRECT |ANSWERS | ✔✔longest |wavelength
If |the |sound |intensity |doubles, |the |sound |level |doubles. |- |CORRECT | ANSWERS |✔✔False Opening |the |end |of |a |closed |pipe |will |double |the |frequency | produced. |- |CORRECT |ANSWERS |✔✔True A |pipe |is |closed |at |one |end |and |has |a |fundamental |frequency |of | 80.0 |Hz. |What |is |the |length |of |the |pipe? |Assume |the |speed |of | sound |in |air |is | 340 |m/s. |- |CORRECT |ANSWERS |✔✔1.06 |m A |pipe |is |open |at |both |ends |and |the |fundamental |frequency |is | 80 | Hz. |What |frequency |will |NOT |be |heard? |- |CORRECT |ANSWERS | ✔✔ 520 |Hz Compute |the |speed |of |sound |in |helium |(M |= |4.0 |g/mol) |at |20oC. | Assume |the |adiabatic |constant |is |1.66. |- |CORRECT |ANSWERS | ✔✔ 1005 |m/s It |is |possible |for |ice |to |be |in |thermal |equilibrium |with |boiling | water. |- |CORRECT |ANSWERS |✔✔True Which |quantities |are |held |constant |in |Boyle's |law? |- |CORRECT | ANSWERS |✔✔mass |and |temperature
The |moment |of |inertia |of |a |hoop |of |radius |r |and |mass |m |is |the | same |as |a |point |particle |of |the |same |mass |rotating |about |a |radius | r. |- |CORRECT |ANSWERS |✔✔True Benzene |is |filled |to |the |brim |in |an |aluminum |container. |The | coefficients |of |volume |expansion |of |benzene |and |aluminum |are | 12.4 |× |10-4/C° |and |7.20 |× |10-5/C°, |respectively. |If |the |temperature | of |the |system |increases, |____ |- |CORRECT |ANSWERS |✔✔the |benzene | will |overflow When |a |flame |is |held |to |the |bulb |of |a |mercury-in-glass | thermometer, |the |mercury |level |will |____. |- |CORRECT |ANSWERS | ✔✔drop |then |rise A |rod |of |length |1.0 |m |increases |in |length |by |2.5 |× |10-5 |m |when |its | temperature |increases |1.0 |C°. |What |is |the |coefficient |of |volume | expansion? |- |CORRECT |ANSWERS |✔✔7.5 |× |10-5/C° A |steel |measuring |tape |is |exactly |6.0 |ft |long |at |a |temperature |of | 65°F. |How |much |does |the |tape |shorten |if |it |is |cooled |to |-40.0°F? | The |coefficient |of |liner |expansion |of |steel |is |0.66 |× |10-5/F°. |- | CORRECT |ANSWERS |✔✔4.2 |× |10-3 |ft
The |rate |at |which |energy |is |propagated |down |a |string |is |not | dependent |on |the |____. |- |CORRECT |ANSWERS |✔✔length |of |the |string Waves |on |guitar |strings |are |____ |waves. |- |CORRECT |ANSWERS | ✔✔transverse The |wave |speed |is |always |equal |to |the |speed |of |the |particles |in | the |elastic |medium. |- |CORRECT |ANSWERS |✔✔False For |a |vibrating |string, |the |third |overtone |will |be |the |same |as |the | ____. |- |CORRECT |ANSWERS |✔✔Fourth |harmonic A |cable | 24 |m |long |and |1.5 |mm |radius |is |stretched |by |a |force |of | 550 |N. |If |the |length |after |stretching |is |24.05 |m. |What |is |the |Young's |modulus |for |the |cable? |- |CORRECT |ANSWERS |✔✔37,400 |MPa If |a |material |has |a |high |measure |of |hardness, |it |will |also |be |very | malleable. |- |CORRECT |ANSWERS |✔✔False A |strip |of |rubber |elongates |4.5 |cm |when |a |9.0 |N |load |is |attached. | How |far |is |it |stretched |if | 18 |N |is |added |to |the |9N |load? |- |CORRECT | ANSWERS |✔✔ 14 |cm
Which |of |the |following |does |not |indicate |heat |flow |as |a |quantity |of | heat |per |unit |time? |- |CORRECT |ANSWERS |✔✔eσT In |a |composite |wall |of |two |or |more |different |materials, |the |same | number |of |calories |is |transferred |per |unit |area |per |unit |time | through |each |material |after |time |is |allowed |for |steady |flow |to |be | established. |- |CORRECT |ANSWERS |✔✔True The |convection |coefficient |for |a |vertical |plate |is |12.7 |× |10- 4 |kcal/sm2C° |when |the |difference |of |temperature |between |the |plate |and |its |surroundings |is |810°C. |How |much |heat |is |transferred |by | convection |from |each |side |of |the |plate |in | 1 |h |if |the |area |is | 20cm2? |- |CORRECT |ANSWERS |✔✔ 7410 |cal A | 50 |W |lightbulb |is |operating |at |a |temperature |of | 675 |˚C. |What |is | the |surface |area |of |the |filament |if |its |emissivity |is |0.65? |- |CORRECT | ANSWERS |✔✔16.8 |cm In |a |conical |pendulum, |if |the |angle |with |the |vertical |is |increased, | which |of |the |following |increases? |- |CORRECT |ANSWERS |✔✔all |of | these |answers Uniform |circular |motion |is |motion |in |which |the |linear |speed | changes |at |a |constant |rate. |- |CORRECT |ANSWERS |✔✔False
A |stone |tied |to |a |string |of |length |0.40 |m |is |moving |with |uniform | circular |motion. |If |it |makes |3.0 |revolutions |each |second, |its | centripetal |acceleration |is |____. |- |CORRECT |ANSWERS |✔✔ 140 |m/s What |is |the |frequency |of |a |satellite |in |a |geosynchronous |orbit | around |the |earth's |surface? |- |CORRECT |ANSWERS |✔✔1.16 |× |10-5 | rev/s As |water |freezes, |its |temperature |____. |- |CORRECT |ANSWERS | ✔✔stays |the |same The |mass |of |water |displaced |by |a |thermometer |in |a |calorimetry | experiment |is |known |as |the |water |equivalent |of |the |thermometer. |- | CORRECT |ANSWERS |✔✔False The |state |of |matter |in |which |atoms |are |in |a |rigid, |crystalline | structure |is |____. |- |CORRECT |ANSWERS |✔✔solid When |a |liquid |freezes, |it |____. |- |CORRECT |ANSWERS |✔✔evolves |heat Since |temperature |is |a |measure |of |the |average |kinetic |energy |per | molecule, |the |absorption |or |emission |of |thermal |energy |is |always | accompanied |by |a |change |in |temperature. |- |CORRECT |ANSWERS | ✔✔False
An |object |rotates |in |a |circle |of |radius | 40 |cm |with |a |period |of |0.25s. | What |is |the |frequency |of |revolution? |- |CORRECT |ANSWERS |✔✔ 4 | rev/s A |car |traveling |on |an |unbanked |road |can |attain |a |maximum |speed | of | 55 |mi/hr |and |stay |on |the |road. |If |the |radius |of |the |road |is | 300 | ft, |what |is |the |coefficient |of |static |friction |between |the |tires |and | the |road? |- |CORRECT |ANSWERS |✔✔0. A |cable | 24 |m |long |and |1.5 |mm |radius |is |stretched |by |a |force |of | 550 |N. |If |the |length |after |stretching |is |24.05 |m. |What |is |the | longitudinal |stress? |- |CORRECT |ANSWERS |✔✔77.8 |MPa Shearing |stress |will |always |increase |the |total |volume |of |a |body. |- | CORRECT |ANSWERS |✔✔False The |coefficient |of |linear |expansion |will |vary |only |with |a |change |in | ____. |- |CORRECT |ANSWERS |✔✔material The |coefficient |of |volume |expansion |for |iron |is |3.6 |x |10-5/Co. |If |a | 17 |m |long |rod |of |iron |is |cooled |from |100oC |to |5oC, |what |it |the | new |length? |- |CORRECT |ANSWERS |✔✔16.981 |m
The |volume |expansion |coefficient |for |ethyl |alcohol |is | 11 |× |10-4/C°. | What |change |in |temperature |must |occur |to |increase |the |volume |of | 16 |L |of |the |alcohol |to | 17 |L? |- |CORRECT |ANSWERS |✔✔56.8 |C° How |much |heat |is |released |when | 350 |grams |of |aluminum |(c |= | 920 | J/kg |. |Co) |is |cooled |from |85oC |to |12oC? |- |CORRECT |ANSWERS | ✔✔23.5 |kJ If |the |same |amount |of |heat |energy |is |transferred |to |bodies |made | of |the |same |material |but |different |sizes, |the |temperature |change | will |be |the |same. |- |CORRECT |ANSWERS |✔✔False The |unit |of |calorie |is |the |only |correct |unit |when |describing |heat | transfer |due |to |temperature |differences. |- |CORRECT |ANSWERS | ✔✔False If |thermal |energy |is |added |to |equal |masses |of |substances, |they | will |show |different |changes |in |temperature |because |their |____ |are | different. |- |CORRECT |ANSWERS |✔✔specific |heats The |heat |of |vaporization |of |liquid |helium |is |5.0 |cal/g |and |its | boiling |point |is |4.1 |Kelvin. |If | 300 |J |of |heat |energy |is |transferred |to |a |dewar |of |liquid |helium, |how |much |is |boiled |off? |- |CORRECT | ANSWERS |✔✔ 14 |g
Which |of |the |following |is |a |sensory |effect |rather |than |a | measurable |physical |quantity? |- |CORRECT |ANSWERS |✔✔Quality The |fundamental |frequency |for |a |20-cm |closed |pipe |when |the | speed |of |sound |is | 340 |m/s |is |____. |- |CORRECT |ANSWERS |✔✔ 425 |Hz A |metal |string |of |mass | 250 |g |and |length | 25 |cm |is |under |a |tension | of | 400 |N. |The |fundamental |frequency |for |this |string |is |____ |- | CORRECT |ANSWERS |✔✔ 40 |Hz During |constructive |interference, |the |individual |wave |pulses |____. |- | CORRECT |ANSWERS |✔✔retain |their |original |sizes |and |shapes A(n) |____ |is |produced |during |destructive |interference |of |waves. |- | CORRECT |ANSWERS |✔✔node A |material |with |a |low |thermal |conductivity |has |a |low |R-value. |- | CORRECT |ANSWERS |✔✔False A |poor |emitter |of |radiation |is |____. |- |CORRECT |ANSWERS |✔✔A |poor | absorber |of |radiation
Which |of |the |following |is |an |example |of |convection |heating? |- | CORRECT |ANSWERS |✔✔ A |material |with |a |high |thermal |conductivity |is |a |good |conductor |of | heat. |- |CORRECT |ANSWERS |✔✔True Increasing |the |angular |speed |of |a |rotating |body |will |not |cause |an | increase |in |____. |- |CORRECT |ANSWERS |✔✔he |moment |of |inertia A |bicycle |wheel |of |diameter | 65 |cm |and |mass |3.5 |kg |rolls |on |a | horizontal |surface |at | 20 |km/hr. |What |is |the |total |kinetic |energy |of | the |wheel |(assume |the |wheel |is |a |hoop)? |- |CORRECT |ANSWERS | ✔✔108J A |hose |is |delivering | 2 |ft3 |of |fluid |every |minute. |If |the |diameter |of | the |hose |is |4.0 |in., |what |is |the |speed |of |the |emerging |fluid? |- | CORRECT |ANSWERS |✔✔0.38 |ft/s An |open-tube |manometer |is |a |device |used |to |measure |absolute | pressure. |- |CORRECT |ANSWERS |✔✔False Water |flows |in |a |horizontal |pipe. |If |the |velocity |at |point |A |is |8.0 |m/s |and |the |velocity |at |point |B |is |4.0 |m/s, |what |is |the |difference |in | pressure |PB |- |PA? |The |density |of |water |is |1000.0 |kg/m3. |- | CORRECT |ANSWERS |✔✔2.4 |× | 104 |Pa
