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Semester 1 review (Year 11 Physics - QLD)

Total questions: 45

Worksheet time: 1hrs 8mins

Name
Class
Date
1.

The transfer of energy through matter by the direct contact of particles is called __.


a)

Conduction

b)

Convection

c)

Radiation

d)

Thermal energy

2.

Which statement is true about radiation?


a)

Collision of particles transfers radiant energy.

b)

Fluid currents transfer radiant energy.

c)

Matter is required to transfer radiant energy.

d)

Electromagnetic waves transfer radiant energy.

3.
Warm air rises and the cool air sinks demonstrates this type of heat transfer. 
a)
conduction
b)
convection
c)
radiation
d)
Insolation 
4.
Heat transfers from an area of ____temperature to an area of ___ temperature.
a)
high to low
b)
low to high
c)
high to high
d)
It can travel high to low and low to high. 
5.

Which will heat up faster?

a)

copper

b)

granite

c)

iron

d)

basalt

6.

The specific heat of platinum is 0.133 J/g°C. How much heat(Q) is released when a 10 g piece of platinum cools from 100°C to 50°C?

a)

66.5 J

b)

665 J

c)

0.0266 J

d)

0.665 J

7.

The specific heat capacity of a substance is 1000 J/kgoC. How much energy is required to raise 1 kg of it by 1oC?

a)

10 J

b)

100 J

c)

1000 J

d)

10,000 J

8.
The temperature of an unknown piece of metal with a mass of 30.00 g changes from 25.0 °C to 35.0 °C when the metal absorbs 350.0 J of energy. What is the specific heat of the metal?
a)
1.17 J/g°C
b)
-1.17 J/g°C
c)
0.857 J/g°C
d)
-0.857 J/g°C
9.

What particle is released when an unstable isotope undergoes alpha radiation?

a)

a neutron

b)

an electron

c)

a photon of light

d)

a helium nucleus

10.

Which type of radiation gives out electron?

a)

Alpha radiation

b)

Beta radiation

c)

Gamma radiation

11.

Which line in the table describes the nature of an alpha-particle and a gamma-ray?

a)

A

b)

B

c)

C

d)

D

12.
This is an example of...
a)
Fission  reaction
b)
Fusion reaction
c)
Decomposition reaction
d)
Decay
13.
Which of these statements correctly describes how the chain reaction occurs in nuclear fission.
a)
Uranium releases electrons to create   electricity
b)
When a nuclear fission reaction occurs, the electrons emitted can strike other nuclei in the sample, and cause them to split
c)
When a nuclear fission reaction occurs, the neutrons emitted can strike other nuclei in the sample, and cause them to split
d)
 Protons and neutrons change to electrons because the nuclei are so big
14.

The process of combining the nuclei of atoms to make different atoms is called _________?

a)

Fission

b)

Nuclear Reaction

c)

Fusion

d)

Particle Accelerator

15.

What is the voltage of a circuit with 4 ohms of resistance and 3 amps of current?

a)

12 V

b)

21 V

c)

4/3 V

d)

3/4 V

16.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
d)
light
17.

What is the current through this circuit?

a)

2 amps

b)

20 amps

c)

0.5 amps

d)

50 amps

18.

When the wave goes from one medium to another medium, some of the wave energy will be _____, some will be absorbed and some will be transmitted.

a)

reflected

b)

transferred

c)

conserved

d)

kept

19.

When a wave pulse hits the end of the rope that is free to move (known as a free boundary), the pulse returns with no change of phase.

a)

True

b)

False

20.

When a wave pulse hits the end of the rope that is fixed (known as a fixed boundary), the pulse returns with no change of phase.

a)

True

b)

False

21.

θ2 = 30o, θ1=?\theta_2\ =\ 30^o,\ \theta_1=?

a)

 30o\ 30^o  

b)

60o60^o  

22.

Calculate the fundamental frequency of a clarinet (closed pipe) with length 60 cm, if the speed of sound is 343 ms-1.

a)

143 Hz

b)

286

c)

572 Hz

d)

2.3 kHz

23.

The 4th harmonic of a guitar string has the frequency 440 Hz, what is the fundamental frequency?

a)

110 Hz

b)

220 Hz

c)

880 Hz

d)

1760 Hz

24.

This equation shows the radioactive decay of thorium (Th). Which of the following particles is released in this reaction?

a)

alpha

b)

beta

c)

neutron

d)

gamma

25.

What sort of decay is this?

a)

alpha

b)

beta

c)

gamma

d)

neutron

e)

none of the above

26.

How do you calculate mass number?

a)

Mass x percent

b)

Protons + Electrons

c)

Protons + Neutrons

d)

Neutrons + Protons + Electrons

27.
Balance the following equation:
146C --> 0-1e + ________
a)
145B
b)
146C
c)
147N
d)
42He
28.
The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?
a)
100.0g
b)
50.0g
c)
12.5g
d)
8.5g
29.
 Fermium-253 has a half-life of 0.334 seconds. A radioactive sample is considered to be completely decayed after 10 half-lives. How much time will elapse for this sample to be considered gone?
a)
0.334 seconds
b)
3.34 seconds
c)
1.77 seconds
d)
13.4 seconds
30.
If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?
a)
1 half-life
b)
2 half-lives
c)
3 half-lives
d)
4 half-lives
31.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

32.

The diagram shows a heating curve for ice. Which line represents the ice melting?

a)

A

b)

B

c)

C

d)

D

e)

E

33.
The graph shows the cooling curve of a substance.
The specific latent heat released at stages?
a)
CD and FG
b)
DE and EF
c)
EF and FG
d)
DE and FG
34.
Which line segment demonstrates vaporization occurring?
a)
B-C
b)
C-D
c)
D-E
d)
E-F
35.
The temperature at which a substance in the liquid state freezes is the same as the temperature at which the substance_________- 
a)
melts
b)
sublimes
c)
boils
d)
condenses
36.

Three resistances 20 Ω, 30 Ω and 60 Ω are connected in parallel, their

combined resistance is given by

a)

110 Ω

b)

50 Ω

c)

20Ω

d)

10 Ω

37.

Combined resistance of 5 Ω and 10 Ω are connected in series is equal to

a)

10 Ω

b)

15 Ω

c)

20 Ω

d)

25 Ω

38.

Calculate the current at the point B

a)

6 A

b)

7 A

c)

8 A

d)

9 A

39.

If light travels from a higher to a lower index of refraction medium the light will

a)

bend away from the vertical axis or may not refract

b)

bend closer to the vertical axis

c)

not bend

d)

answer is not here

40.

Light travels from air (n = 1.000) into an optical fiber. If the angles of incidence and refraction are 22oand 15º respectively. what is the index of refraction inside the fiber? Round off your values to 3 sig. figs.

a)

1.45

b)

1.44

c)

0.69

d)

0.70

41.

Light travels from air (n = 1.00) into a second material. The incident ray of light hits the surface at angle of 64o and the refracted ray enters the second material at an angle of 32o. What is the index of refraction of the second material? n1sin(Θ1) = n2sin(Θ2)

a)

1.4

b)

0.90

c)

0.53

d)

1.7

42.

How many antinodes does this standing wave have?

a)

5

b)

6

c)

7

d)

8

43.
What kind of wave is pictured?
a)
Transverse
b)
Longitudinal
c)
surface
d)
none of the above
44.

Sketch A shows two identical pulses traveling in opposite directions along a string, each with a speed of 1.0 cm/s. After 4.0 s, the string will look like which of the other sketches?

a)

1

b)

2

c)

3

d)

4

e)

5

45.

The air in a closed organ pipe vibrates as shown. The length of the pipe is 3.0 m. The frequency of vibration is 80 Hz. The speed of sound in the pipe is approximately

a)

80 m/s

b)

0.16 km/s

c)

0.24 km/s

d)

0.32 km/s

e)

0.96 km/s

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