Category: Physics

Physics Year 12 Random Retrieval

This quiz contains all the questions in the Physics Year 12 section. The website will pick 10 questions at random.

1 / 10

Select the best statement for Newton's 2nd Law

An object will remain at rest or at a constant velocity unless acted on by a resultant force.

The rate of change in momentum of a body is directly proportional to the resultant force applied.

An object will remain at rest unless acted on by a resultant force.

When two objects interact they will exert equal and opposite forces on each other.

2 / 10

A strong woman lifts a car at an angle of 25° and horizontal component of force is 1300 N. Calculate vertical component of the lift.

520.2 N

633.9 N

634.4 N

1501.1 N

3 / 10

A Y7 drags behind them their cooking, PE kit and textbooks behind them with a force of 676 N and an angle of 30°. Calculate the vertical component of the force.

247 N

338 N

585 N

923 N

4 / 10

The unit of current is the ampere. A correct alternative unit is:

VΩ

VΩ^-1

V^-1Ω^-1

ΩV^-1

5 / 10

Which piece of equipment can be used to measure the current in a circuit?

Ammeter

Voltmeter

Oscilloscope

Newton Meter

6 / 10

Which material on the graph above is the strongest?

7 / 10

Fishermen use sonar to detect the depth of fish beneath the boat. On this occasion, the echo returned after 0.83 s. The speed of sonar waves through water is 1500 m s^-1. Calculate the depth of the fish.

180.7 m

553.3 m

1245 m

1807 m

8 / 10

Light of wavelength 7.12x10^-7 m is incident on a diffraction grating with a line spacing of 1.89x10^-6 m. Calculate the angle from the normal to the 2nd order maximum.

13.2°

22.1°

48.9°

63.4°

9 / 10

Light passes from air through a glass container and into olive oil. Select the diagram that best shows this. Refractive indexes are as follows: glass = 1.52 and oil = 1.47

10 / 10

Polarisation only occurs with which type of waves?

Transverse Wave

Longitudinal Wave

Your score is

Waves and the Nature of Light Random Retrieval

Waves & the Nature of Light Random Retrieval

This quiz contains all the questions in the Waves & the Nature of Light section. The website will pick 10 questions at random.

1 / 10

The Young’s double slit experiment is an example of light as a __________.

Wave

Particle

2 / 10

For the first electron to be liberated from a helium atom 24.6 eV of energy is required. Calculate the frequency of light needed.

2.70 x10^-35 Hz

5.94x10¹⁵ Hz

1.68x10¹⁶ Hz

3.71x10³⁴ Hz

3 / 10

Light of wavelength 7.12x10^-7 m is incident on a diffraction grating with a line spacing of 1.89x10^-6 m. Calculate the angle from the normal to the 2nd order maximum.

13.2°

22.1°

48.9°

63.4°

4 / 10

The greatest amount of diffraction occurs when _________.

The gap is half the size of the wavelength.

The gap and the wavelength are the same size.

The gap is twice the size of the wavelength.

The gap doesn't affect diffraction.

5 / 10

Select the correct statement.

A virtual image is formed by the convergence of light towards a point.

A real image is formed by the divergence of light away from a point.

A real image is formed by the convergence of light away from a point.

A virtual image is formed by the divergence of light away from a point.

6 / 10

Calculate the critical angle for the boundary when light leaves a medium of refractive index 1.52 and enters air.

0.01°

0.65°

41.1°

65.7°

7 / 10

The wavelength of a standing wave on a string fixed at both ends is 35 cm at the sixth harmonic, what is the full length of the string?

0.7m

1.05 m

2.1 m

2.45 m

8 / 10

Two points on a wave have a phase difference of 1080°, are they in phase?

Yes

No - they are out of phase

No - they are exactly out of phase

9 / 10

Soumya plays a note of wavelength 25 cm on her synthesiser. She knows the speed of sound is 340 ms^-1 in air. Calculate the frequency.

13.6 Hz

85 Hz

1360 Hz

8.5 kHz

10 / 10

Calculate the speed of a wave with a time period of 1x10^-3 s and a wavelength of 250 cm.

400 ms^-1

2500 ms^-1

4000 ms^-1

2.5x10⁵ ms^-1

Your score is

Physics Random Retrieval Y12

Physics Year 12 Random Retrieval

This quiz contains all the questions in the Physics Year 12 section. The website will pick 10 questions at random.

1 / 10

What is 3 mT in femtoteslas?

3x10¹⁰ fT

3x10¹² fT

3x10¹⁵ fT

2 / 10

What multiple of unit does pico (p) have?

1 x 10^-9

1 x 10^-12

1 x 10 ^-15

3 / 10

The table above shows the weight of various aliens on their home planets and their planets g value. Select the alien with the greatest mass.

Bleet

Blergh

Bloot

Marvin

4 / 10

Select the statement that best describes what is happening at point X.

Object is travelling at constant velocity.

Object is stationary.

Object is accelerating constantly.

Object is accelerating.

5 / 10

Neil Armstrong uses a catapult to horizontally shoot a rock at Buzz Aldrin on the Moon from a height of 2 m. He misses and it lands at Buzz's feed, 20 m from where it was fired.

Calculate the velocity the rock was fired at from the catapult. g_Moon = 1.62 ms^-2

1.6 ms^-1

8.1 ms^-1

12.7 ms^-1

31.4 ms^-1

6 / 10

A scuba diver surfaces after a dive. She begins to swim towards the boat at a constant speed of 67 cms^-1 and due to a current in the water this takes her 70 seconds an an angle of 32°. Calculate the time taken if there was no current at the same speed.

40 s

47 s

59 s

67 s

7 / 10

The unit of charge is the coulomb. A correct alternative unit is:

JAΩ

JA^-1Ω^-1

JAΩ^-1

JA^-1Ω

8 / 10

Select the effect on V_out when the surrounding temperature increases for circuit.

V_out increases.

V_out decreases.

V_out remains constant.

9 / 10

How should you connect a potential difference measuring piece of equipment in a circuit?

It doesn't need connecting to the circuit.

In parallel to the battery.

In parallel to the component you want to know the potential difference over.

In series.

10 / 10

This diagram shows a ray of light travelling through a semi-circular glass block. Which letter would represent the critical angle if TIR occurred?

Your score is

Working as a Physicist Random Retrieval

This quiz contains all the questions in the Working as a Physicist section. The website will pick 10 questions at random.

1 / 10

What is 74235.44 to 3 significant figures.

74000

74000.000

74200

74200.000

2 / 10

What is 0.0000176700 to 2 significant figures.

0.000017

0.0000177

0.000018

0.0000180

3 / 10

What is 40011 to 2 significant figures.

40000

40001

40010

40011

4 / 10

Identify the control variable: Investigating the boiling point of different liquids.

Boiling point of liquid

Type of liquid

Volume of liquid

5 / 10

In the equation of a straight line, y = mx + c , select the letter that represents the gradient.

6 / 10

Calculate the gradient of the graph shown.

-1.28

-0.80

1.28

2.32

7 / 10

Estimate the area under the graph shown above

0.047

0.094

0.192

192

8 / 10

Select the missing word: _______ errors affect accuracy.

Random

Systematic

9 / 10

A student measures the temperature of boiling water (100°C) with a thermometer with an uncertainty of ± 2°C. Select the range where the true value could be.

98°C - 100°C

99°C - 101°C

98°C - 102°C

100° - 102°C

10 / 10

The radius of a cheesecake in the staff room is 7.5 ±0.5 cm, what is the percentage uncertainty for the area of the cheesecake?

3.34%

6.67%

13.34%

44.49%

Your score is

Mechanics Random Retrieval

This quiz contains all the questions in the Mechanics section. The website will pick 10 questions at random.

1 / 10

A 0.3 m long screwdriver is placed under the circular lid of a paint can and a force of 15 N is applied downward at the end of the screwdriver and the lid opens, pivoting at the opposite side to the screwdriver. The lid has a circumference of 48 cm. Calculate the moment about the open side of the lid.

4.5 N

5.6 N

6.8 N

11.7 N

2 / 10

A uniform plank GD has mass 13 kg and length 1.8 m. A mass 6.8 kg is attached to the plank at D. The plank remains balanced due two ropes attached The tension in the rope at G is half the tension of the the rope at A, calculate the tension in the rope at A. g = 9.81 ms^-2

59 N

130 N

234 N

469 N

3 / 10

A VW campervan cruises along a straight, flat Autobahn at a speed of 130 kmh^-1. The total resistive force, due to air resistance, is 900 N.

If the overall efficiency of the campervan is 18%, calculate the energy obtained from its fuel during 42 km journey.

3.25x10⁷ J

5.85x10⁷ J

1.23x10¹⁰ J

6.81x10¹⁰ J

4 / 10

A 15 N force is applied to a 2.3 kg mass for 8 seconds. Calculate its initial momentum.

15.0 kg ms^-1

18.4 kg ms^-1

34.5 kg ms^-1

120.0 kg ms^-1

5 / 10

Complete the sentence: "Frictional forces reduce _________ "

Acceleration

Speed

Velocity

Air resistance

6 / 10

Select one way to increase the terminal velocity of an object.

Increase the frictional force.

Increase the driving force.

Decrease the driving force.

Increase the mass of the object.

7 / 10

A strong woman lifts a car at an angle of 25° and horizontal component of force is 1300 N. Calculate vertical component of the lift.

520.2 N

633.9 N

634.4 N

1501.1 N

8 / 10

Neil Armstrong uses a catapult to horizontally shoot a rock at Buzz Aldrin on the Moon from a height of 2 m. He misses and it lands at Buzz's feed, 20 m from where it was fired.

Calculate the velocity the rock was fired at from the catapult. g_Moon = 1.62 ms^-2

1.6 ms^-1

8.1 ms^-1

12.7 ms^-1

31.4 ms^-1

9 / 10

Which is the correct definition for velocity?

The rate of change of an object's displacement.

The rate of change of an object's speed.

The rate of change of an object's velocity

The rate of change of an object's speed, squared.

10 / 10

Select if the following is a scalar or a vector: energy

Scalar

Vector

Your score is

Electric Circuits Random Retrieval

This quiz contains all the questions in the Electric Circuits section. The website will pick 10 questions at random.

1 / 10

The unit of resistance is the ohm. A correct alternative unit is:

WA²

WA^-1

WA^-2

2 / 10

Select a use for this circuit when the temperature fluctuates. Assume V_out is the location of external circuitry

A fan to switch on in warm temperatures.

Street lights to switch on in darkness.

Operate a heater in a reptile house.

A speaker that operates upon sunrise.

3 / 10

A cell of e.m.f. 3.0 V and internal resistance 0.3 Ω is connected in a series with an ammeter reading 0.25 A and a motorised hula girl who dances when the circuit is complete. Calculate the power supplied by the cell.

0.71 W

0.73 W

0.75 W

0.77 W

4 / 10

What is Ɛ measured in terms of SI base units?

m² kg s^-3 A^-1

m² kg s^-2

J s^-1 A^-1

m^-1 kg s^-2

5 / 10

Which of these expressions is not a correct expression for calculating the electrical power of a circuit?

Expression A

Expression B

Expression C

Expression D

6 / 10

When the LHC is full operational in the summer months, it accounts for 115 MW of CERN's 200 MW requirements. Calculate the total energy transferred over 28 days for the LHC.

2.78x10¹⁴ J

3.81x10¹⁴ J

4.84x10¹⁴ J

7.62x10¹⁴ J

7 / 10

Which graph best represents the I-V characteristic graph of a metallic conductor at a constant temperature?

8 / 10

Which of these circuit symbols represents a thermistor?

9 / 10

A resistor in a circuit has a current through it of 0.20 A when the potential difference across it is 15 V. Calculate the resistance of the resistor.

0.013 Ω

3 Ω

75 Ω

130 Ω

10 / 10

How should you connect a potential difference measuring piece of equipment in a circuit?

It doesn't need connecting to the circuit.

In parallel to the battery.

In parallel to the component you want to know the potential difference over.

In series.

Your score is

Materials Random Retrieval

This quiz contains all the questions in the Materials section. The website will pick 10 questions at random.

1 / 10

HMS Astute is a nuclear-powered submarine in service with the Royal Navy, she can dive to depth of 300 m in seawater of density 1024 kgm^-3. If the pressure inside the submarine is kept at sea level (1.01x10⁵ Pa), calculate the resultant force on a section of the hull of area 20 m² at her maximum depth.

2.1x10⁸ N

3.4x10⁸ N

5.8x10⁸ N

6.0x10⁸ N

2 / 10

The ship, Queen Elizabeth 2, was a cruise ship from 1969-2008. She currently resides in Mina Rashid, Dubai as a floating hotel. When fully laden she held 70,327 tonnes and therefore displaces that weight of fluid when afloat. If the the density of seawater is 1024 kgm^-3, calculate the upthrust exerted on the ship when she was afloat fully laden. g = 9.81 NKg^-1

6.7x10⁵ N

6.9x10⁸ N

7.1x10⁸ N

7.1x10¹¹ N

3 / 10

A copper wire of diameter 0.6 mm, X, is joined in series to the end of another copper wire of diameter 0.125 mm, Y. Both wires are 80 cm in length when no load is applied. A 15 N load is hung on the end of the wires as shown in the diagram below. If the Young's Modulus of copper is 128 GPa, calculate the extension for each wire.

ExtensionX = 0.3 mm, ExtensionY = 7.6 mm

ExtensionX = 0.4 mm, ExtensionY = 9.5 mm

ExtensionX = 1.4 mm, ExtensionY = 1.6 mm

ExtensionX = 2.3 mm, ExtensionY = 11.9 mm

4 / 10

Which material on the graph above is the weakest?

5 / 10

A new material is developed and the research team want to know the amount of elastic strain energy it can store. They test the material multiple times and plot a graph with the averages. Estimate from the graph the elastic strain energy that is stored in the wire up to the limit of proportionality.

4.0 J

5.85 J

6.75 J

11.7 J

6 / 10

A wire has a diameter of d and a when a force of F is applied, it breaks at σ. What would the value of σ be if the diameter was halved?

^F/₂

^4F/_A

^F/_2A

^AF/₂

7 / 10

The graph above shows a fishing wire being extended by adding masses. Use the graph to estimate the elastic strain energy of the material.

9.7 J

10.0 J

19.4 J

32.3 J

8 / 10

What is the relationship between the force applied, F, and the extension, x of a material that obeys Hooke's Law?

F = x

F ∝ x

F ≈ x

F = x ^-1

9 / 10

What is another term for tensile deformation?

Extension

The Limit of Proportionality

Compression

The Elastic Limit

10 / 10

If the deformation of the material is plastic, the material __________.

is plastic.

will shear under high loads.

will not return to its original shape.

will return to its original shape.

Your score is

Waves & the Nature of Light Random Retrieval

This quiz contains all the questions in the Waves & the Nature of Light section. The website will pick 10 questions at random.

1 / 10

The h in E = hf represents:

Number of photons

Planck constant

Boltzmann constant

Intensity of light

2 / 10

The electromagnetic spectrum is an example a ____________.

Transverse wave

Longitudinal wave

3 / 10

What is the effect on the emission of electrons the frequency of the incident light was increased?

More electrons are emitted from the surface of the metal

Nothing

The same amount of electrons will be emitted from the surface of the metal but with a greater kinetic energy.

Less electrons will be emitted from the surface of the metal but with a greater kinetic energy.

4 / 10

What is meant by the threshold frequency for a metal?

The frequency of light required to cause electrons to eject from any metal at the speed of light.

The frequency of light required to cause electrons to eject from any metal.

The frequency of light required to cause electrons to eject from a specific metal at the speed of light.

The frequency of light required to cause electrons to eject from a specific metal.

5 / 10

Why is gel added to a patient's skin when using ultrasound?

Makes the ultrasound transducer easier to slide over skin.

Prevents air entering between the transducer and skin blocking the ultrasound waves entering the body.

Makes the skin cold and reduces the interference from infrared radiation.

Prevents air entering between the transducer and skin reflecting away the ultrasound waves entering the body.

6 / 10

What is the technique used in ultrasound scanning?

Sonar

Pulse-Echo

US-Reflection

Transducing

7 / 10

Light travelling through air is incident on glass at an angle of 23°. The refractive index of the glass is 1.52. Calculate the angle of refraction.

0.3°

14.9°

23.0°

25.7°

8 / 10

Light travels at 2.25x10⁸ ms^-1 in water, what is the refractive index of water?

0.75

1.33

1.59

9 / 10

Identify the stationary wave pattern for a string at the fourth harmonic.

10 / 10

What is the wavelength of the fifth harmonic of a stationary wave on a string of length 4m fixed at both ends?

0.67 m

0.8 m

1.25 m

1.6 m

Your score is

Materials Random Retrieval

This quiz contains all the questions in the Materials section. The website will pick 10 questions at random.

1 / 10

When the temperature increases, what is the effect on fluids' viscosities?

Gases become less viscous, liquids become more viscous.

Gases become more viscous, liquids become less viscous.

Gases and liquids become less viscous.

Gases and liquids become more viscous.

2 / 10

A 4.2 g balloon is inflated with 1.8 g of air until it is 1.4x10^-3 m³ in volume. Calculate the density of the inflated balloon.

1.3 kgm^-3

3.0 kgm^-3

4.3 kgm^-3

8.4 kgm^-3

3 / 10

ExtensionX = 0.3 mm, ExtensionY = 7.6 mm

ExtensionX = 0.4 mm, ExtensionY = 9.5 mm

ExtensionX = 1.4 mm, ExtensionY = 1.6 mm

ExtensionX = 2.3 mm, ExtensionY = 11.9 mm

4 / 10

Which material on the graph above is the strongest?

5 / 10

Which material on the graph above is the weakest?

6 / 10

4.0 J

5.85 J

6.75 J

11.7 J

7 / 10

A copper wire has a length of 25 cm and a force of 400 N is applied to the wire, which causes it to stretch to 28.9 cm. Calculate the elastic strain energy stored in the wire.

7.8 J

15.6 J

78 J

156 J

8 / 10

This graph shows the extension of 4 different springs, which spring is the stiffest?

9 / 10

Under a 4 N force, two identical springs, in parallel, stretch 130 mm. Calculate the spring constant for one of the springs.

7.7 Nm^-1

15.4 Nm^-1

30.7 Nm^-1

61.5 Nm^-1

10 / 10

If the deformation of the material is plastic, the material __________.

is plastic.

will shear under high loads.

will not return to its original shape.

will return to its original shape.

Your score is

Electric Circuits Random Retrieval

This quiz contains all the questions in the Electric Circuits section. The website will pick 10 questions at random.

1 / 10

The unit of power is the watt. A correct alternative unit is:

VCs^-1

Ω²V^-2

V²Ω

V²Ω^-2

2 / 10

Calculate the current at A₁ in the circuit shown.

0.13 A

1.37 A

2.05 A

2.93 A

3 / 10

The current at A₁ is 4 A and the current at A₂ is 1 A. Select the current at A₃.

1 A

2 A

3 A

4 A

4 / 10

Which of these expressions is not a correct expression for calculating the electrical power of a circuit?

Expression A

Expression B

Expression C

Expression D

5 / 10

Select the missing word: "The shallower the gradient of a I-V characteristic graph, the ____________ the resistance of the conductor.

Smaller

Larger

Weaker

6 / 10

Which of the following options is the unit for resistivity?

Ωm

Ω²

Ωm²

7 / 10

If the area (A) of a material was to doubled, what would the resistance be?

R/2

R²

8 / 10

Potential difference is...

The current per second of a closed circuit.

The work done per unit charge moved.

The amount of charge passing a point in a closed circuit per second.

The difference in unit charge either side of a battery.

9 / 10

The current in a circuit depends on the mean drift velocity of the charge carriers. This can be defined by this equation, what is the current if the cross sectional area of the material doubles?

I/2

I²

10 / 10

Which piece of equipment can be used to measure the current in a circuit?

Ammeter

Voltmeter

Oscilloscope

Newton Meter

Your score is

Mechanics Random Retrieval

This quiz contains all the questions in the Mechanics section. The website will pick 10 questions at random.

1 / 10

Select the SI unit for Energy.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

2 / 10

Select the best statement for Newton's 1st Law:

An object will remain at rest unless acted on by a resultant force.

An object will remain at rest or at a constant velocity unless acted on by a resultant force.

The rate of change in momentum of a body is directly proportional to the resultant force applied.

When two objects interact they will exert equal and opposite forces on each other.

3 / 10

A Y7 drags behind them their cooking, PE kit and textbooks behind them with a force of 676 N and an angle of 30°. Calculate the vertical component of the force.

247 N

338 N

585 N

923 N

4 / 10

Select the correct graph for these values shown of an animal stalking its prey.

5 / 10

Estimate the displacement shown on this velocity-time graph for a Y7 trying to find a classroom during their first week in secondary.

36 m

45 m

60 m

63 m

6 / 10

Neil Armstrong uses a catapult to horizontally shoot a rock at Buzz Aldrin on the Moon from a height of 2 m. He misses and it lands at Buzz's feed, 20 m from where it was fired.

Calculate the velocity the rock was fired at from the catapult. g_Moon = 1.62 ms^-2

1.6 ms^-1

8.1 ms^-1

12.7 ms^-1

31.4 ms^-1

7 / 10

Marvin the Martian fires his gun horizontally at Bugs Bunny at a height of 60 cm. It fires at 550 ms^-1, but misses. Calculate how far away from Marvin the shot lands. g_Mars = 3.71 ms^-2

67.3 m

177.9 m

192.4 m

312.8 m

8 / 10

A paratrooper jumps from an aircraft. Assuming no air resistance, she accelerates due to gravity for 12 seconds before deploying her parachute. Calculate how far she falls from the aircraft until she deploys her parachute.

27 m

59 m

117 m

706 m

9 / 10

40 s

47 s

59 s

67 s

10 / 10

Select if the following is a scalar or a vector: energy

Scalar

Vector

Your score is

Working as a Physicist Random Retrieval

This quiz contains all the questions in the Working as a Physicist section. The website will pick 10 questions at random.

1 / 10

How many significant figures are in 4.00013?

2 / 10

What is 4.9999 to 3 decimal places.

4.9900

4.9990

4.999

5.000

3 / 10

What is 1.7334 x 10³ to 3 significant figures.

1.70 x 10³

1.7 x 10³

1.73 x 10³

1.730 x 10³

4 / 10

Which unit measures electric potential difference?

amperes

volts

ohms

5 / 10

What multiple of unit does mega (M) have?

1 x 10⁶

1 x 10⁹

1 x 10 ¹²

6 / 10

Select the graph that best represents the algebraic expression: y = b

7 / 10

Select the graph that best represents the algebraic expression: y = mx² + c

8 / 10

Select the graph that best represents the algebraic expression: y = mx^-1 + c

9 / 10

A mass of 3 ± 0.2kg is accelerated 10 ± 0.15 ms^-1. Calculate the force applied.

30 ± 1.50% N

30 ± 3.12% N

30 ± 8.17% N

30 ± 10.01% N

10 / 10

A ruler with an uncertainty of ± 0.5 mm measures the length of a Subway Footlong to be 292 mm, what is the uncertainty in the measurement.

± 0.50 mm

± 1.00 mm

± 2.00 mm

± 2.50 mm

Your score is

U11.1 – The 4 Types of Nuclear Radiation

The Four Types of Nuclear Radiation

1 / 15

Select the correct symbol for Alpha radiation.

2 / 15

Which material is sufficient to stop Beta-minus radiation?

A few cm of air

Paper

A few mm of aluminium

A vacuum

3 / 15

What is not a source of background radiation?

Cosmic radiation

WiFi devices

Rocks

Medical devices

4 / 15

What is a Beta-plus particle?

Positron

Electron

Helium Nucleus

Photon

5 / 15

What is not a cause of instability in the nucleus?

Too few neutrons

Too few nucleons

Too much energy

Too many neutrons

6 / 15

Which of the following is the least ionising?

Alpha

Beta-minus

Beta-plus

Gamma

7 / 15

Select the most appropriate word to complete the sentence: "Radioactive Decay is ____________."

Dangerous

Random

Endothermic

Exothermic

8 / 15

What is the relative charge of an Alpha particle?

9 / 15

What is the range of a Beta-plus particle?

Negligible

The same as Beta-minus

The opposite of Beta-minus

Infinite

10 / 15

What is the relative charge of a Beta-minus particle?

11 / 15

What is the charge of an Alpha particle?

1.6x10^-19

3.2x10^-19

6.4x10^-19

12 / 15

Which of the following is the most penetrating?

Alpha

Beta-minus

Beta-plus

Gamma

13 / 15

What is the fastest moving type of radiation?

Alpha

Beta-minus

Beta-plus

Gamma

14 / 15

What is the charge of an Beta-plus particle?

Negligible

1.6x10^-19 C

-1.6x10^-19 C

15 / 15

Select the correct statement.

The more ionisations, the further the radiation will travel.

The more ionisations, the faster the radiation will travel.

The less ionisations, the faster the radiation will travel.

The less ionisations, the further the radiation will travel.

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Nuclear Radiation

U10.3 – The Doppler Effect

The Doppler Effect

1 / 10

When a light source moves away from an observer, the wavelength becomes ____________.

Shorter

Longer

Stays the same

2 / 10

Which stationary observer will hear a higher pitched sound?

3 / 10

When a light source moves away from an observer, the light undergoes __________.

blueshift

redshift

whiteshift

blackshift

4 / 10

Select the best definition for the Big Bang Theory.

The universe exploded into existence from a single point.

An American TV sitcom centred around scientists.

All matter was originally compacted into a ball with infinite density and intense heat and began expanding.

All matter was originally compacted into a ball with infinite density and intense heat. The matter began expanding and continues to do so to this day,

5 / 10

Andromeda has a redshift of -0.001001, what is it's movement in relation to Earth?

Away from Earth

Towards Earth

Stationary

Can't tell

6 / 10

A galaxy has redshift of 0.19. Estimate the speed it is moving relative to Earth. H₀ = 75 kms^-1MPc^-1. 1 year ≈ 3.16x10⁷s, 1 pc ≈ 3.09x10¹⁶ m, c = 3x10⁸ ms^-1

5.70x10⁷ ms^-1

1.59x10⁹ ms^-1

7.83x10¹⁶ ms^-1

2.35x10²⁵ ms^-1

7 / 10

A galaxy has redshift of -0.32. Estimate the speed it is moving relative to Earth. H₀ = 75 kms^-1MPc^-1. 1 year ≈ 3.16x10⁷s, 1 pc ≈ 3.09x10¹⁶ m, c = 3x10⁸ ms^-1

9.37x10⁶ ms^-1

9.60x10⁷ ms^-1

1.32x10¹⁷ ms^-1

3.96x10²⁵ ms^-1

8 / 10

On this graph, which line represents the density of the universe is less than the critical density?

9 / 10

A galaxy has redshift of 0.48. Estimate the distance it is from Earth in light years. H₀ = 75 kms^-1MPc^-1. 1 year ≈ 3.16x10⁷s, 1 pc ≈ 3.09x10¹⁶ m, c = 3x10⁸ ms^-1

1.44x10⁸ ly

5.49x10⁹ ly

5.93x10²⁵ ly

6.25x10²⁵ ly

10 / 10

Estimate the diameter of the observable universe. H₀ = 75 kms^-1MPc^-1. 1 year ≈ 3.16x10⁷s, 1 pc ≈ 3.09x10¹⁶ m, c = 3x10⁸ ms^-1

1.3x10⁹ ly

2.6x10⁹ ly

1.3x10¹⁰ ly

2.6x10¹⁰ ly

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