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PHYS | 101 |Ivy |Tech |Rakesh |K |Shah |All |Exam |
Questions |with |correct |answers
A |boat |loaded |with |rocks |is |floating |in |a |swimming |pool. |If |the | rocks |are |thrown |into |the |pool, |the |water |level |in |the |pool, |after | the |rocks |have |settled |to |the |bottom, |- |CORRECT |ANSWERS |✔✔falls. An |air |bubble |underwater |has |the |same |pressure |as |that |of |the | surrounding |water. |As |the |air |bubble |rises |toward |the |surface |(and | its |temperature |remains |constant), |the |volume |of |the |air |bubble |- | CORRECT |ANSWERS |✔✔increases. Ideal |incompressible |water |flows |through |a |horizontal |pipe |of |cross- sectional |area |10.0 |cm2 |at |a |pressure |of |0.250 |atm |with |a |volume | flow |rate |of |1.00 |× |10-3 |m3/s. |At |a |valve, |the |effective |cross- sectional |area |of |the |pipe |is |reduced |to |5.00 |cm2. |What |is |the | pressure |at |the |valve? |- |CORRECT |ANSWERS |✔✔0.235 |atm How |many |grams |of |ethanol |(density |0.80 |g/cm3) |should |be |added | to |5.0 |g |of |chloroform |(density |1.5 |g/cm3) |if |the |resulting |mixture |is |to |have |a |density |of |1.2 |g/cm3? |Assume |that |the |fluids |do |not | change |their |volumes |when |they |are |mixed. |- |CORRECT |ANSWERS | ✔✔2.0 |g
The |root-mean-square |speed |of |the |molecules |of |an |ideal |gas |is |v. | The |gas |is |now |slowly |compressed |to |one-half |its |original |volume | with |no |change |in |temperature. |What |is |the |root-mean-square | speed |of |the |molecules |now? |- |CORRECT |ANSWERS |✔✔v A |mole |of |diatomic |oxygen |molecules |and |a |mole |of |diatomic | nitrogen |molecules |are |at |STP. |Which |statements |are |true |about | these |molecules? |(There |could |be |more |than |one |correct |choice.) |- | CORRECT |ANSWERS |✔✔Both |gases |have |the |same |number |of | molecules. Both |gases |have |the |same |average |kinetic |energy |per |molecule. Oxygen |condenses |into |a |liquid |at |approximately | 90 |K. |What | temperature, |in |degrees |Fahrenheit, |does |this |correspond |to? |- | CORRECT |ANSWERS |✔✔-297°F The |coefficient |of |linear |expansion |of |copper |is | 17 |× |10-6 |K-1. |A | sheet |of |copper |has |a |round |hole |with |a |radius |of |3.0 |m |cut |out | of |it. |If |the |sheet |is |heated |and |undergoes |a |change |in |temperature |of | 80 |K, |what |is |the |change |in |the |radius |of |the |hole? |- |CORRECT | ANSWERS |✔✔It |increases |by |4.1 |mm. If, |with |steady |state |heat |flow |established, |you |double |the | thickness |of |a |wall |built |from |solid |uniform |material, |the |rate |of | heat |loss |for |a |given |temperature |difference |across |the |thickness | will |- |CORRECT |ANSWERS |✔✔become |one-half |its |original |value.
The |momentum |of |an |isolated |system |is |conserved |- |CORRECT | ANSWERS |✔✔in |both |elastic |and |inelastic |collisions. A |50-g |ball |moving |at | 10 |m/s |in |the |+x |direction |suddenly |collides | head-on |with |a |stationary |ball |of |mass | 100 |g. |If |the |collision |is | perfectly |elastic, |what |is |the |velocity |of |each |ball |immediately |after | the |collision? |- |CORRECT |ANSWERS |✔✔-3.3 |m/s, |+6.7 |m/s A |0.24 |kg |blob |of |clay |is |thrown |at |a |wall |with |an |initial |horizontal | velocity |of |16m/s. |If |the |clay |comes |to |a |stop |in |91ms |what |is |the | average |horizontal |force |on |the |clay |due |to |the |wall? |- |CORRECT | ANSWERS |✔✔ 42 |N If |the |answer |to |your |calculation |has |units |of |kg |m2/s, |what |type | of |quantity |could |it |be? |(There |could |be |more |than |one |correct | choice). |- |CORRECT |ANSWERS |✔✔angular |momentum When |is |the |angular |momentum |of |a |system |constant? |- |CORRECT | ANSWERS |✔✔Only |when |no |net |external |torque |acts |on |the |system. A |force |of |16.88N |is |applied |tangentially |to |a |wheel |of |radius |0.340 | m |and |causes |an |angular |acceleration |of |1.20 |rad/s2. |What |is |the | moment |of |inertia |of |the |wheel? |- |CORRECT |ANSWERS |✔✔4.78 |kg | m
A |uniform |135-g |meter |stick |rotates |about |an |axis |perpendicular |to | the |stick |passing |through |its |center |with |an |angular |speed |of |3.50 | rad/s. |What |is |the |magnitude |of |the |angular |momentum |of |the | stick? |- |CORRECT |ANSWERS |✔✔0.0394 |kg |m2/s The |graph |in |the |figure |shows |the |tensile |stress |as |a |function |of | the |tensile |strain |in |a |certain |wire. |What |does |the |slope |of |this | graph |give |us |for |this |wire? |- |CORRECT |ANSWERS |✔✔Young's | modulus |for |the |material |of |the |wire A |25-kg |piece |of |equipment |can |be |hung |by |steel |wires |of |length | 1.00 |m, |2.00 |m, |or |3.00 |m. |If |all |the |wires |have |the |same |diameter, | which |one |will |stretch |the |greatest |percent? |- |CORRECT |ANSWERS | ✔✔They |will |all |stretch |by |the |same |percent. A |copper |sphere |that |is | 10 |cm |in |diameter |at |an |atmospheric | pressure |of |1.01 |× | 105 |N/m2 |is |put |into |a |chamber |where |the | pressure |is |1.0 |× | 106 |N/m2. |What |is |the |change |in |the |diameter |of | the |sphere |caused |by |this |change |in |pressure? |The |bulk |modulus | for |copper |is |1.4 |× | 1011 |Pa. |- |CORRECT |ANSWERS |✔✔-2.1 |× |10-5 |cm Opposing |shearing |forces |of | 3000 |N |are |applied |to |the |3.00-cm |× | 4.00-cm |faces |of |a |metal |block |measuring |3.00 |cm |× |4.00 |cm |× | 5.00 |cm. |By |what |distance |does |the |block |become |slanted? |The |
weight |on |Earth, |the |weight |of |this |debris |is |- |CORRECT |ANSWERS | ✔✔one-quarter |of |its |weight |on |the |surface |of |the |earth. The |reason |an |astronaut |in |an |earth |satellite |feels |weightless |is |that |- |CORRECT |ANSWERS |✔✔the |astronaut |is |falling. Two |moons |orbit |a |planet |in |circular |orbits. |Moon |A |has |orbital | radius |R, |and |moon |B |has |orbital |radius |4R. |Moon |A |takes | 20 |days | to |complete |one |orbit. |How |long |does |it |take |moon |B |to |complete | an |orbit? |- |CORRECT |ANSWERS |✔✔ 160 |days Two |horizontal |curves |on |a |bobsled |run |are |banked |at |the |same | angle, |but |one |has |twice |the |radius |of |the |other. |The |safe |speed | (for |which |no |friction |is |needed |to |stay |on |the |run) |for |the |smaller | radius |curve |is |v. |What |is |the |safe |speed |on |the |larger-radius |curve? |- |CORRECT |ANSWERS |✔✔v√ 2 A |35-N |bucket |of |water |is |lifted |vertically |3.0 |m |and |then |returned | to |its |original |position. |How |much |work |did |gravity |do |on |the | bucket |during |this |process? |- |CORRECT |ANSWERS |✔✔ 0 |J If |the |force |on |an |object |is |in |the |negative |direction, |the |work |it | does |on |the |object |must |be |- |CORRECT |ANSWERS |✔✔The |work | could |be |either |positive |or |negative, |depending |on |the |direction | the |object |moves.
An |ideal |spring |has |a |spring |constant |(force |constant) |of | 60 |N/m. | How |much |energy |does |it |store |when |it |is |stretched |by |1.0 |cm? |- | CORRECT |ANSWERS |✔✔0.0030 |J The |figure |shows |a |famous |roller |coaster |ride. |You |can |ignore | friction. |If |the |roller |coaster |leaves |point |Q |from |rest, |what |is |its | speed |at |the |top |of |the |25-m |peak |(point |S)? |- |CORRECT |ANSWERS | ✔✔ 22 |m/s In |the |number |0.00723, |the |number |of |significant |figures |is. |- | CORRECT |ANSWERS |✔✔ 3 If |an |operatic |aria |lasts |for |5.75 |min, |its |length |expressed |in | seconds |is |x |s, |where |x |is |- |CORRECT |ANSWERS |✔✔greater |than | 5.75. Albert |uses |as |his |unit |of |length |(for |walking |to |visit |his |neighbors | or |plowing |his |fields) |the |albert |(A), |the |distance |Albert |can |throw | a |small |rock. |One |albert |is |How |many |square |alberts |is |equal |to | one |acre? |(1 |acre |= |43,560 |ft2 |= | 4050 |m2) |- |CORRECT |ANSWERS | ✔✔0.48 |square |alberts What |is |the |sum |of |1.53 |+ |2.786 |+ |3.3 |written |with |the |correct | number |of |significant |figures? |- |CORRECT |ANSWERS |✔✔7.
If |a |vector |A |has |components |Ax |< |0, |and |Ay |> |0, |then |the |angle | that |this |vector |makes |with |the |positive |x-axis |must |be |in |the | range |- |CORRECT |ANSWERS |✔✔ 90 ° |to | 180 ° Three |vectors |S |, |T |, |and |U |, |have |the |components |shown |in |the | table. |What |is |the |magnitude |of |the |resultant |of |these |three | vectors? |- |CORRECT |ANSWERS |✔✔2.00 |m A |projectile |is |fired |from |ground |level |on |a |horizontal |plain. |If |the | initial |speed |of |the |projectile |is |now |doubled, |and |we |neglect |air | resistance, |- |CORRECT |ANSWERS |✔✔its |range |will |quadruple.
