scele kuiz akhir pekan 12

7/27/2019 scele Kuiz Akhir Pekan 12

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Kuiz Akhir Pekan 12 - Gerak Periodik dan Temperatur - kali percobaan menjawab 1

Question 1 | Tanda: 1

Sepotong besi berada di kamar bertemperatur 31,0 Fahrenheit. Jika besi dan lingkungan sekitarnya berada dalam

keseimbangan termal, maka temperatur termodinamik besi adalahChoose one answer.

a .

b .

c .

d .

e .

Correct


Bandul sebuah jam dinding tua terbuat dari sebuah cakram berjejari 5,00 cm dan bermassa 212 gr dan sebilah metal

bermassa 123 gr dan panjang 114 cm. Salah satu ujung metal ditempelkan di tepi cakram. Berapakah frekuensi

osilasi bandul ini? Gunakan percepatan gravitasi 9,8 m/s.

Choose one answer.

a .

b .

c .

d .

e .

Correct


Sepotong gabus bermassa 2,00 gr terombang ambing di permukaan danau. Gabus ini berosilasi di vertikal dengan

periode 9,00 s dan amplitude 2,00 cm. Pada waktu t = 0, gabus berada di posisi keseimbangan dengan energypotensial sama dengan nol. Hitunglah energi potensial gabus ini saat t = 8,41 s.

Choose one answer.

a .

b .

c .


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d .

e .

Correct


F is how many degrees Celsius?

Choose one answer.

a . 158

b . 49

c . 56

d . 31

e . 195

Correct


Sebuah bejana berisi gas ideal sebanyak 2,00 mol dengan tekanan Pa. dan volume 2,00 liter. Gas

mengembang secara isotermis hingga volume gas menjadi 2,51 liter. Tekanan gas saat itu adalah

Choose one answer.

a .

b .

c .

d .

e .

Incorrect


A mass suspended from a spring is seen to bob up and down over a distance of 20 cm from the top to the bottom of

its path twice each second. What is its amplitude?Choose one answer.

a . 20 cm

b . 10 cm

c . 2 s


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d . 90 kg

e . 0.5 Hz

Correct


Sebuah bejana ukuran 2,00 liter, berisi gas ideal sebanyak 2,00 mol. Saat tekanan di dalam bejana

Pa., temperatur gas adalah

Choose one answer.

a .

b .

c .

d .

e .

Incorrect


Pucuk dahan sebatang pohon berosilasi dengan periode 9,00 s dan amplitude 2,00 cm. Pada waktu t = 0, pucuk

dahan berada di posisi keseimbangan. Hitunglah kecepatan osilasi pucuk dahan ini saat t = 8,61 s.

Choose one answer.

a .

b .

c .

d .

e .

Incorrect


A long pendulum hanging from the ceiling of the classroom has a period of 4 s. What is the frequency of this

pendulum?

Choose one answer.

a . 1/2 Hz

b . 1/4 Hz


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c . 4 Hz

d . 2 Hz

e . 1/3 Hz

Correct


9.0 g of water in a 2.0-L pressure vessel is heated to C. What is the pressure inside the container? (R = 0.082

L.atm/mol.K, one mole of water has a mass of 18 grams)

Choose one answer.

a . 32 atm

b . 45 atm

c . 16 atm

d . 7.9 atm

e . 24 atm

Correct

Kuiz Awal Pekan 14 - Mesin Kalor, Entropi, dan Hukum 2 Termodinamika - kali percobaan

menjawab 1


Perubahan entropi bernilai nol pada:Choose one answer.

a . seluruh proses adiabatis

b . proses isotermal reversibel

c . proses adiabatis reversibel

d . proses isobarik reversibel

e . proses reversibel selama tidak ada kerja yang dilakukan

Correct


The second law of thermodynamics says that

Choose one answer.

a . none.


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b . it is impossible to build a heat engine that can do mechanical work by extracting thermal energy that does

not also exhaust heat to the surroundings.

c . the energy of an isolated system is conserved.

d . it is impossible to build a heat engine that does more mechanical work than the thermal energy it consumes.

e . it is impossible to reach the absolute zero of temperature.

Correct


Perhatikan proses berikut: I. energi mengalir dalam bentuk panas dari benda yang lebih panas ke benda yang lebih

dingin; II. kerja yang dilakukan pada sistem dan besar energi yang sama dikeluarkan dalam bentuk panas oleh

system; III. energi yang diserap oleh sistem dan besar kerja yang sama dilakukan oleh system. Manakah yang tidak

pernah terjadi?

Choose one answer.

a . Hanya I

b . Hanya III

c . Hanya II dan III

d . Hanya II

e . I, II, dan III

Correct


What restrictions does the second law of thermodynamics place on building a perpetual motion machine?

Choose one answer.

a . The machine must have a very long cyclical period.

b . Thermal energy cannot be completely converted to mechanical energy.

c . It does not place any restriction on the possibility.

d . none.

e . Energy must be conserved.

Correct



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Mesin panas Carnot beroperasi antara reservoir panas dengan temperatur absolut dan reservoir dingin dengan

temperatur . Efisiensi mesin tersebut adalah:

Choose one answer.

a .

b .

c . 100%

d .

e .

Correct


Which of the following choices best corresponds to what is required by the second law of thermodynamics for any

process taking place in an isolated system?

Choose one answer.

a . entropy remains constant

b . both choices C and D are valid.

c . entropy increases

d . entropy decreases

e . entropy equals work done on the system

Correct


A Carnot engine runs between a hot reservoir at and a cold reservoir at . If one of the temperatures is either

increased or decreased by 3.5 K, which of the following changes would increase the efficiency by the greatest

amount?

Choose one answer.

a . decreasing

b . cannot be determined from information given

c . increasing

d . increasing

e . decreasing

Correct


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Pada setiap proses reversibel, yang melibatkan sistem dan lingkungan:

Choose one answer.

a . semua salah

b . total entropi sistem dan lingkungan bertambah

c . entropi sistem tetap

d . entropi bertambah

e . total entropi sistem dan lingkungan tetap

Incorrect


A ball lying on the floor does NOT coordinate the kinetic energy of its randomly moving atoms and suddenly leap upoff the floor because

Choose one answer.

a . none.

b . this would violate the first law of thermodynamics.

c . Although it could happen in principle, it is extremely unlikely.

d . this would violate the second law of thermodynamics.

e . the total energy of the system would have to increase.

Correct


Seorang penemu mengklaim bahwa ia memiliki mesin dengan efisiensi 40% ketika dioperasikan antara reservoir

temperatur tinggi C dan reservoir temperatur rendah C. Mesin ini:

Choose one answer.

a . pasti melanggar hukum termodinamika ke-3

b . pasti melanggar hukum termodinamika ke-0

c . tidak melanggar hukum termodinamika manapun

d . pasti melanggar hukum termodinamika ke-2

e . pasti melanggar hukum termodinamika ke-1

Correct


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scele kuiz akhir pekan 12

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