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

A 75 N force is applied to the end of a spanner that is 25 cm long. Calculate the size of the moment?

1.875 Nm

18.75 Nm

187.5 Nm

1875 Nm

2 / 10

The diagram above shows a uniform rod of negligible mass. At which position on the rod is no moment exerted?

3 / 10

The unit of potential difference is the volt. A correct alternative unit is:

JA^-1t^-1

JAt

J^-1At

JAt^-1

4 / 10

A head torch used on a D of E expedition is rated at 3W with a 3.7 V battery, how many electrons pass through in the 5 minutes it takes for a return trip to campsite bathroom at night?

5.07x10¹⁸ electrons

1.30x10¹⁹ electrons

3.04x10²⁰ electrons

1.52x10²¹ electrons

5 / 10

Two springs attached in series extend by 5 cm when a load of F is applied to them. They have different constants of 76 Nm^-1 and 31 Nm^-1 respectively. Calculate the value of F.

1.1 N

2.7 N

5.4 N

10.6 N

6 / 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.

7 / 10

Select the missing phrase: "For an object to be resolved in the body, the ultrasound wavelength must be ________ the object."

Larger than

Smaller than

The same size as

Half the size of

8 / 10

Remember Young's slits from GCSE? He's back! Incident monochromatic light of 0.43 μm is shone on a double slit of separation of 0.26 mm. If the screen is 42 cm away from the grating, calculate the fringe width.

8.92x10^-11 m

6.95x10^-4 m

3.40x10^-2 m

No diffraction pattern is produced

9 / 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

10 / 10

Mark reads the back label of his microwave oven, it says frequency = 2450 MHz. Calculate the wavelength.

12.2 cm

73.5 cm

1.22 m

122 m

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

Hot gases produce ___________.

Line Absorption Spectra.

Line Emission Spectra.

Band Absorption Spectra.

Band Emission Spectra.

2 / 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

3 / 10

Which one of the following types of wave can't be polarised?

gamma

ultraviolet

infrared

ultrasonic

4 / 10

BBC Radio Sheffield West Midlands broadcasts on 97.4 MHz. Calculate the wavelength of the radio waves.

0.32 m

3.08 m

33.35 m

318.67 m

5 / 10

Calculate the wavelength of a monochromatic light incident on a diffraction grating of 2.67x10⁶ lines per metre with an angle of 17° to the first order maxima.

5.40x10^-8 m

1.09x10^-7 m

4.54x10³ m

7.81x10⁵ m

6 / 10

Diffraction is an example of light behaving as a __________.

Particle

Wave

7 / 10

Which type(s) of images do concave lenses form?

Real only

Virtual only

Both real and virtual

8 / 10

Which lens causes light to diverge?

Convex

Concave

9 / 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°

10 / 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

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

The electromotive force, or e.m.f. (Ɛ), is measured in which unit?

Joules

Volts

Newtons

Coulombs

2 / 10

Which graph best represents the resistance of an NTC thermistor?

3 / 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.

4 / 10

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

It doesn't need connected to the circuit.

In parallel to the battery.

In parallel to the component you want to know the current through.

In series.

5 / 10

Which way does current flow in a circuit?

Negative to positive

Positive to negative

Clockwise

Anti-clockwise

6 / 10

Which diagram is showing laminar flow?

7 / 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

8 / 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.

9 / 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

10 / 10

Calculate the speed of a wave with a frequency of 10 kHz and a wavelength of 2 m.

0.2 ms^-1

5 ms^-1

20 ms^-1

20 kms^-1

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 103000?

2 / 10

Which unit measures pressure?

newtons

kilograms

pascals

3 / 10

What multiple of unit does giga (G) have?

1 x 10⁶

1 x 10⁹

1 x 10 ¹²

4 / 10

What multiple of unit does centi (c) have?

1 x 10^-1

1 x 10^-2

1 x 10 ^-3

5 / 10

Select the correct definition for the phrase "Control Variable"

what is changed in an investigation

what is kept the same

what is measured

6 / 10

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

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 precision.

Random

Systematic

9 / 10

Which is not an action to reduce random errors in an investigation.

Calibrate apparatus by measuring a known value.

Take 3 repeats and calculate a mean.

Use equipment with an appropriate scale.

Use a computer/data logger where available.

10 / 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

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

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

3 / 10

Sheffield is famous for its snooker. A 170 g white ball is struck with a cue and travels along the snooker table at 12 ms^-1. Calculate it's momentum.

2.04 kg ms^-1

204 kg ms^-1

2040 kg ms^-1

4 / 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

5 / 10

A screaming toddler is trying to run away in a shop and is pulling their fathers arm at an angle of 14° and a force of 235 N. Calculate the horizontal component acting on the father.

32 N

57 N

228 N

232 N

6 / 10

A bus is slowing down to stop at a bus stop. Select the graph which shows best describes it's motion.

7 / 10

A train leaves the station and accelerates at a constant rate, a. After time t its velocity is v. What was the trains velocity at 4t?

[1] √4 v

[2] 0.25 v

[3] v²

[4] 4v

8 / 10

Achsa runs 1.2 km up at hill with a 40° incline in 438 seconds, calculate her horizontal displacement from her starting position.

536 m

638 m

771 m

919 m

9 / 10

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

Scalar

Vector

10 / 10

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

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 resistivity is the ohm-metre. A correct alternative unit is:

AmV^-1

VmA^-1

VAm^-1

Am^-1V^-1

2 / 10

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

JΩC^-1

J^-1ΩC

JΩ^-1C^-1

JΩ^-1C

3 / 10

Calculate the current at A₃ in the circuit shown.

0.55 A

1.37 A

1.43 A

1.5 A

4 / 10

Which of these expressions is not a correct expression for calculating Ɛ?

Expression A

Expression B

Expression C

Expression D

5 / 10

A battery with internal resistance 0.4 Ω and an e.m.f. of 15 V powers a portable speaker with a resistance of 9 Ω. Calculate the voltage across the speaker when it is being used.

13.4 V

14.4 V

15.3 V

15.9 V

6 / 10

A battery of e.m.f. 7 V is connected across a 42 Ω resistor. If the potential difference across the resistor is 6 V, calculate the internal resistance of the cell.

6 A

7 A

8 A

9 A

7 / 10

Which of these circuit symbols represents an LDR?

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

In this diagram, what should the potential difference of the cell be?

0 V

3.6 V

6 V

8.4 V

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

Two wires, Q and W, are connected in series and a force, F is applied. Q and W have the same length, l the same diameter, d but are made from different materials. Therefore, the Young's Modulus of Q, E, is twice the value of W. Which expression is correct for the total extension in the system?

2 / 10

The Young's Modulus for a single walled carbon fibre nanotubes of diameter 4 nm is 1000 GPa. If it is placed under 75% strain, what force is required to break it?

3.8x10^-6 N

9.4x10^-6 N

3.8x10³⁰ N

9.4x10³⁰ N

3 / 10

The graph above shows a wire being extended by adding masses. Estimate from the graph the Young's modulus.

0.67 Jm^-3

1.50 Jm^-3

192 Jm^-3

384 Jm^-3

4 / 10

Which material on the graph above is the weakest?

5 / 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

6 / 10

A wire of 1.2 m extends a 3 mm when a load of 20 N is applied to it. Calculate it's strain.

2.5x10^-3 Nm^-2

2.5x10^-3

0.4 Nm^-2

0.4

7 / 10

A wire has a diameter of 0.5 mm and a breaking stress of the wire is 7.4x10¹⁰ Nm^-2. Calculate the mass that would break the wire. g = 9.81 ms^-2

1.5x10⁴ N

1.5x10⁶ N

3.7x10⁷ N

3.7x10⁸ N

8 / 10

What is another term for tensile deformation?

Extension

The Limit of Proportionality

Compression

The Elastic Limit

9 / 10

Estimate k from the graph shown above.

3.75 Nm^-1

5 Nm^-1

37.5 Nm^-1

50 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

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

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.

3 / 10

What happens when a ultrasound wavelength meets an interface in the body?

The ultrasound waves are reflected.

The ultrasound waves are transmitted.

Some ultrasound waves are reflected and some are transmitted.

Some ultrasound waves are absorbed by body tissue and the rest are scattered.

4 / 10

180.7 m

553.3 m

1245 m

1807 m

5 / 10

An image of a perfectly circular object of radius 25.8 cm is projected onto a screen. The object is also perfectly circular and has an area of 16.3 cm. Calculate the magnification on the lens.

1.58

5.24

32.6

128.9

6 / 10

What is the name of distance between the lens and the principal focus?

Focal length

Principal length

Lens length

Real length

7 / 10

The refractive index of glass is 1.52, what speed does light travel through it?

1.97x10⁸ ms^-1

2.97x10⁸ ms^-1

3x10⁸ ms^-1

4.56x10⁸ ms^-1

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

Which condition is not necessary for the production of a stationary wave?

The waves are travelling in opposite directions.

An equal ratio of nodes to antinodes.

The waves are coherent.

The waves are in the same medium.

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

Materials Random Retrieval

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

1 / 10

A ball bearing of diameter 5.6 mm is dropped into a liquid which has a viscosity of 5.4 Pa s and a density of 1.38 kgL^-1. In the liquid, it reaches a terminal velocity of 0.023 ms^-1. Calculate the mass of the ball bearing. g=9.81 Nkg^-1

0.055 g

0.059 g

0.541 g

0.589 g

2 / 10

In order to calculate viscous drag (F), the equation above is used. What is a unit for η?

Nkg^-1

Nms^-1

Nkgm^-1

Nsm^-2

3 / 10

A steel ball bearing is dropped into a fluid and travels 60 cm in 2.53 s. The diameter of the ball bearing is 6 mm and its mass 15.3 g. Calculate the viscosity of the fluid. g=9.81 Nkg^-1

1.1 Pa s

5.6 Pa s

11.2 Pa s

56.0 Pa s

4 / 10

Which diagram is showing laminar flow?

5 / 10

Stress and strain are used to calculate the Young's modulus of a material up to its _____________.

elastic limit.

limit of proportionality.

yield point.

breaking point.

6 / 10

A 500 mm material undergoes a strain of -3.2%, when measured what is the materials length?

484 mm

492 mm

508 mm

516 mm

7 / 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

8 / 10

When plotting a force extension graph for the loading and unloading of a material, when would the unloading line not pass through the origin?

When the limit of proportionality has been passed.

When the elastic limit has been passed.

When a metallic material is used.

When synthetic material is used.

9 / 10

Two springs attached in series extend by 5 cm when a load of F is applied to them. They have different constants of 76 Nm^-1 and 31 Nm^-1 respectively. Calculate the value of F.

1.1 N

2.7 N

5.4 N

10.6 N

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 resistance is the ohm. A correct alternative unit is:

WA²

WA^-1

WA^-2

2 / 10

Select effect on V_out when the light intensity increases on this circuit.

V_out increases.

V_out decreases.

V_out remains constant.

3 / 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

4 / 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

5 / 10

Which of these circuit symbols represents an LDR?

6 / 10

Which of these circuit symbols represents a thermistor?

7 / 10

Which of the following options is the unit for resistivity?

Ωm

Ω²

Ωm²

8 / 10

In this diagram, what should the potential difference of the cell be?

0 V

3.6 V

6 V

8.4 V

9 / 10

Calculate the potential difference of a battery that has 230 J of energy and moves 120 C of charge.

0.52 V

1.92 V

2.76 V

27600 V

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

A mini-cannon of mass 35.5 kg fires a turnip of mass 1.2 kg. If the turnip leaves the cannon at 214 ms^-1 over 0.3 s, with what force does the mini-cannon recoil?

43 N

257 N

360 N

856 N

2 / 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.

3 / 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.

4 / 10

Select the missing phrase. "A joiner uses a hammer to hit a nail into wood. When the hammer strikes the nail, _____________

the nail exerts an equal force back on the hammer and doesn't move.

the nail exerts an equal force back on the hammer and moves into the wood.

the nail exerts a force proportional to its size back on the hammer and doesn't move.

the nail exerts a force proportional to its size back on the hammer and moves into the wood.

5 / 10

A mug of tea (T_m) is at rest on a table. Select the correct pairing of forces.

Gravitational force pulls (T_m) towards the table. (T_m) pushes on the table in the opposite direction.

(T_m) pushes on the table. The table pushes back on (T_m) in the opposite direction.

(T_m) pulls the table towards it with gravitational force. The table pushes back on (T_m) in the opposite direction.

(T_m) pushes on the table. The table is pulled down by gravitational force.

6 / 10

Four teachers are fighting over the last pack of board pens as shown in the diagram. Calculate the overall resultant force.

62.46 N

62.48 N

104.44 N

106.72 N

7 / 10

A train leaves the station and accelerates at a constant rate, a. After time t its velocity is v. What was the trains velocity at 4t?

[1] √4 v

[2] 0.25 v

[3] v²

[4] 4v

8 / 10

A diver steps off the end of the 10 m board, free falls, then hits the water before travelling underwater 4 m in 2 seconds. Calculate his speed upon hitting the water. g = 9.81 ms^-2

5.09 ms^-1

8.00 ms^-1

14.01 ms^-1

19.62 ms^-1

9 / 10

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

Scalar

Vector

10 / 10

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

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

How many significant figures are in 103000?

3 / 10

Which is the SI unit for luminous intensity of an object?

lux

pascals

candela

4 / 10

Which unit measures electric charge?

coulombs

ohms

farads

5 / 10

What multiple of unit does giga (G) have?

1 x 10⁶

1 x 10⁹

1 x 10 ¹²

6 / 10

Select the correct definition for the phrase "Control Variable"

what is changed in an investigation

what is kept the same

what is measured

7 / 10

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

8 / 10

Select the correct unit for the area under the graph

ms^-2

ms^-1

s^-1

9 / 10

A group of students time a ball bearing dropping through a tube of glycerol. They record the following times, in seconds: 9.2, 9.0, 8.9, 8.9 and 9.5. What is the uncertainty?

± 0.1 s

± 0.2 s

± 0.3 s

± 0.6 s

10 / 10

Calculate the percentage uncertainty of line c (dashed).

4.3%

5.9%

11.4%

54.6%

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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