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

Which is the SI unit for length?

millimetre

metre

astronomical unit

2 / 10

An ill prepared student asks for a pen to write with in class, and the teacher grudgingly lends one out. Instead of walking over to the student, the teacher decides to throw them the pen. The teacher throws the pen at angle of 14° and a speed of 23 ms^-1. Sadly, the teacher misses and the pen continues on it's projected path out the window and takes 5 seconds to hit the car park outside.

Calculate the height different between the point of release and the car park floor. g_Earth = 9.81 ms^-2

95 m

96 m

112 m

123 m

3 / 10

Calculate the current at A₂ in the circuit shown.

0.15 A

0.21 A

0.36 A

0.51 A

4 / 10

Your phone charger supplies a current of 2.1 A and has a power rating of 6 W. What is the potential difference?

0.35 V

1.26 V

2.86 V

12.6 V

5 / 10

Which graph best represents the I-V characteristic graph of a diode?

6 / 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

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 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.

9 / 10

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

0.75

1.33

1.59

10 / 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

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 Photoelectric Effect is an example of light as a __________.

Wave

Particle

2 / 10

The work function of an unknown metal is 1.2 eV. Light with energy 3 eV is incident on its surface, calculate the wavelength of the light.

6.63x10^-26 m

7.24x10^-14 m

4.14x10^-7 m

4.52x10³³ m

3 / 10

What is the technique used in ultrasound scanning?

Sonar

Pulse-Echo

US-Reflection

Transducing

4 / 10

Monochromatic light of wavelength λ diffracts through a grating of d. What happens to the value of θ if the wavelength was changed to 2λ?

Nothing

θ would increase

θ would decrease

5 / 10

A lens has a focal length of 4.8 cm. Calculate the lens' power.

0.21 D

2 D

4.8 D

8.3 D

6 / 10

Which lens causes light to diverge?

Convex

Concave

7 / 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

8 / 10

On a stationary wave, where is there maximum vibration.

Nodes

Antinodes

9 / 10

Two points on a wave have a phase difference of 7π radians, are they in phase?

Yes

No - they are out of phase

No - they are exactly out of phase

10 / 10

Which wave is being described here: The motion of energy is perpendicular to the direction of travel.

Transverse Wave

Longitudinal Wave

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

Which of the following quantities has the same unit as the rate of change of momentum?

energy

weight

work

acceleration

2 / 10

This graph shows a falling object at its terminal velocity. Calculate its velocity.

0.75 ms^-1

0.78 ms^-1

1.5 ms^-1

1.56 ms^-1

3 / 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

4 / 10

A house attached to lots of balloons takes flight at 5.20 ms ^-1 and, due to a cross wind, at an angle of 56° from the horizontal. What would it's vertical speed be assuming there was no wind.

1.59 ms^-1

2.91 ms^-1

4.31 ms^-1

8.11 ms^-1

5 / 10

A battery of e.m.f. E, with an internal resistance, r, was connected in series with a variable resistor, R and an ammeter. Looking at the readings from the above table, calculate the e.m.f. of the battery.

0.4 V

3.6 V

4.0 V

4.5 V

6 / 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

7 / 10

Which sentence is true of ultrasound transducers?

The pulses must be long and the gaps between pulses must be short.

The pulses must be short and the gaps between pulses must be long.

The pulses and the gaps between pulses must be the same duration.

8 / 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.

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

What is 1291 to 2 significant figures.

1000

1200

1290

1300

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 0.0000176700 to 2 significant figures.

0.000017

0.0000177

0.000018

0.0000180

2 / 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

3 / 10

Which is the SI unit for length?

millimetre

metre

astronomical unit

4 / 10

Which unit measures power?

watts

joules

volts

5 / 10

Which unit measures electrical resistance?

ohms

volts

farads

6 / 10

Which unit measures electric potential difference?

amperes

volts

ohms

7 / 10

Identify the a control variable: How does bulb brightness vary with bulb type?

Type of bulb

Light intensity of bulb

Power supplied to bulb

8 / 10

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

9 / 10

Calculate the area under the graph shown above.

67.5

87.5

104.5

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

Select the SI unit for Work.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

3 / 10

If the resultant force is zero, then an object is at rest.

TRUE

FALSE

4 / 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.

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

You hang up your GCSE Physics certificate in a frame. The whole thing has a mass of 3.2 kg. Calculate the the tension in the picture frame wire. g = 9.81 ms^-2

21 N

23 N

43 N

46 N

7 / 10

A shotput is launched on sports day by the strongest Y7. She throws it at an angle of 30° at a speed of 18 ms^-1, releasing it at a height of 1.9 m. Calculate how far she throws it. g_Earth = 9.81 ms^-2

1.72 m

2.98 m

18.23 m

31.58 m

8 / 10

A rugby player accelerates steadily from rest at 1.82 ms^-2 for 4 seconds. Calculate their final speed.

2.70 ms^-1

3.79 ms^-1

7.28 ms^-1

15.16 ms^-1

9 / 10

David walks 6 km west then 8 km north. Calculate his displacement.

6 km

8 km

10 km

14 km

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 resistance is the ohm. A correct alternative unit is:

VW^-2

WV^-2

V²W^-2

V²W^-1

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

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

Expression A

Expression B

Expression C

Expression D

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

Which of these circuit symbols represents a thermistor?

6 / 10

Which graph best represents the resistance of an NTC thermistor?

7 / 10

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

R/2

R²

8 / 10

The unit for potential difference is Voltage, what is this in SI base units?

m² kg s^-3 A^-1

A s

J s^-1 A^-1

9 / 10

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

2 V

4 V

8 V

0 V

10 / 10

Calculate the the time taken for a current of 5.2 mA to reach a charge of 25 C.

0.13 seconds

4.8 seconds

2 minutes 10 seconds

80 minutes 8 seconds

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 undertaking practical work to measure the viscosity of liquid, why should the marker the signifies timer start be approximately halfway down the tube?

To reduce the percentage error.

To reduce the human error.

To allow the ball bearing to reach terminal velocity.

All of the above.

2 / 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

3 / 10

When a ball bearing is dropped through a liquid of unknown viscosity, the sum of all the forces equal ___________.

Zero

The overall weight.

The overall drag.

The overall upthrust

4 / 10

What conditions are required for Stokes's law to apply?

Spheres at low speed flow.

Spheres at high speed flow.

Cubes at low speed flow.

Cube at high speed flow.

5 / 10

A material has a stress of 6x10⁸ Nm^-2 and is placed under a 5% strain. Calculate the value for the materials Young's modulus.

1.2x10⁸ Nm^-2

3x10⁹ Nm^-2

1.2x10¹⁰ Nm^-2

3x10¹¹ Nm^-2

6 / 10

Select the graph with the correct labels.

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

Estimate k from the graph shown above.

3.75 Nm^-1

5 Nm^-1

37.5 Nm^-1

50 Nm^-1

10 / 10

A spring extends by 12 cm when a mass of 87 g is attached to it. Calculate the spring constant. g = 9.81 ms^-2

0.01 Nm^-1

0.10 Nm^-1

1.02 Nm^-1

10.24 Nm^-1

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

Electrons can show can show wave light properties.

TRUE

FALSE

2 / 10

The work functions of four metals are shown above. These metals are irradiated by incident light of 5.2x10¹⁴ Hz, which metals will emit electrons?

All four metals.

Potassium, Sodium and Zinc only.

Potassium only.

None of the metals.

3 / 10

Select the missing word: "For ultrasounds, ________ wavelengths produce clearer images".

Shorter

Longer

High amplitude

Low amplitude

4 / 10

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

gamma

ultraviolet

infrared

ultrasonic

5 / 10

An inverted image is seen 3 times its original size when the object is placed 140 mm front of a convex lens. Calculate the focal length of the lens.

95 mm

105 mm

140 mm

420 mm

6 / 10

An object is 30 mm from a convex lens with focal length 8 cm. Is the image virtual or real?

Real

Virtual

7 / 10

Which lens causes light to diverge?

Convex

Concave

8 / 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

9 / 10

If unpolarised light waves pass through two polarised filters, and no light can be seen through them, what is the angle between the two transmission axes of the filters?

0°

45°

90°

180°

10 / 10

Which wave is being described here: The motion of energy is along the same direction as the direction of travel.

Transverse Wave

Longitudinal Wave

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

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

2 / 10

Which material is the densest?

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

What is the units for Young's modulus in terms of SI units?

kg m^-2

kgm^-1s^-1

kgm^-1s^-2

kgm^-2s^-3

5 / 10

Select the graph with the correct labels.

6 / 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

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

Two nichrome wires, A and B, have a load of 30 N placed on them each. The original lengths of the wires are 3 m and 2 m. Each wire shows the same extension. Find the ratio of A_k to B_k.

1 : 1

3 : 2

1.5 : 1

Unable to calculate from information given.

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

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

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

Calculate the current at A₁ in the circuit shown.

0.21 A

0.51 A

0.79 A

1.37 A

4 / 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

5 / 10

A 12 Ω and a 10 Ω resistor are connected in series with a battery of e.m.f. 6 V and internal resistance 2 Ω. Calculate the potential difference over the battery.

0.25 V

2.5 V

5.5 V

8.5 V

6 / 10

Which of these circuit symbols represents an LDR?

7 / 10

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

2 V

4 V

8 V

0 V

8 / 10

What would be the n value of a perfect insulator?

Very small

9 / 10

Calculate the charge of 2.7 A current flowing for 3 minutes.

8.10 C

66.7 C

143 C

486 C

10 / 10

Which way does current flow in a circuit?

Negative to positive

Positive to negative

Clockwise

Anti-clockwise

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

This diagram shows the direction of force for four students pushing on a door at different distances from the hinge, d_pivot. Which student is applying the greatest moment?

2 / 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.

3 / 10

Complete the sentence: "Acceleration is always __________ the resultant force."

in the opposite direction as

perpendicular to

in the same direction as

irrelevant to

4 / 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

5 / 10

Burj Khalifa (Arabic: برج خليفة‎) is the tallest building in the world stood at 828 m. A family are stood at a observation deck at 555 m and the super strong toddler throws it's rattle away at a velocity of 21 ms^-1 and an angle of 43°.

Calculate how long the rattle takes to hit the ground. g_Earth = 9.81 ms^-2

9.1 s

12.2 s

14.5 s

18.3 s

6 / 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

7 / 10

There are exploration rovers on the Moon. One rover malfunctions and can't be controlled from Earth, it maintains a constant velocity of 8 kmh^-1 in the same direction. After some time it reaches the edge of a crater and goes over the edge, falling 300 m to the ground.

Calculate how long it takes to fall. g_Moon = 1.62 ms^-2

7.82 s

16.44 s

19.25 s

135.14 s

8 / 10

A climber falls from a rock face and accelerates due to gravity for 3 seconds before his rope stops his fall. What distance did he fall?

14.7 m

29.4 m

44.1 m

88.3 m

9 / 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

10 / 10

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

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

What is 84937 to 4 significant figures.

84900

84930

84940

85000

2 / 10

Which is the SI unit for the amount of a substance?

kilogram

mole

litre

3 / 10

Which unit measures power?

watts

joules

volts

4 / 10

Which unit measures frequency?

seconds

metres

hertz

5 / 10

Which unit measures electric charge?

coulombs

ohms

farads

6 / 10

What multiple of unit does milli (m) have?

1 x 10^-3

1 x 10^-6

1 x 10 ^-9

7 / 10

Select the correct definition for the phrase "Dependent Variable"

what is changed in an investigation

what is kept the same

what is measured

8 / 10

What is a fair test?

A fair test is when only the independent variable has been allowed to affect the dependent variable.

A fair is when you repeat the experiment until you have concurrent results.

A fair test is when results are taken three times and an average is found.

9 / 10

Select the correct unit for the area under the graph

ms^-2

ms^-1

s^-1

10 / 10

Select the missing word: _______ errors affect accuracy.

Random

Systematic

Your score is

U11.1 – The 4 Types of Nuclear Radiation

143

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

141

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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