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

What multiple of unit does femto (f) have?

1 x 10^-15

1 x 10¹²

1 x 10 ¹⁵

2 / 10

Trolley jousting. A Lidl Trolley T_L of mass 21.0 kg, collides on a horizontal frictionless surface with an Aldi Trolley, T_A of mass 22.5 kg. Before the collision T_L was moving at 3.0 ms^-1 and T_A was at rest. They get stuck together, calculate their velocity.

0 ms^-1. T_L and T_A do not move any further.

1.45 ms^-1

2.8 ms^-1

3.0 ms^-1

3 / 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.

4 / 10

What is the vertical component if F is applied at θ to the horizontal.

5 / 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.

6 / 10

A 75 watt light bulb is left ON for 24 hours, calculate the total energy transferred.

1800 J

1.08 x10⁵ J

6.48x10⁶ J

3.89x10⁸ J

7 / 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°

8 / 10

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

Real only

Virtual only

Both real and virtual

9 / 10

In a fibre optic cable the core has a refractive index of 1.52 and it's cladding is 1.34. Calculate the critical angle at the boundary between the core and cladding of the cable.

0.02°

41.1°

44.7°

69.1°

10 / 10

What is 1291 to 2 significant figures.

1000

1200

1290

1300

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

Which phenomenon of light can be explained by light acting as a particle or wave?

Diffraction

Reflection

Photoelectric Effect

Polarisation

2 / 10

Photons are an example of light as a __________.

Wave

Particle

3 / 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.

4 / 10

In the context of electrons in atoms, what is excitation?

Enough energy is absorbed by an electron causing it to move to a higher energy level.

Enough energy is absorbed by an electron causing it to break free of the atom.

Enough energy is absorbed by an atom causing it to release all its electrons.

Enough energy is absorbed by an atom causing all its electrons to move up an energy level.

5 / 10

Reducing the width of a single slit that has monochromatic light passing through affects the central maximum, how?

The width and intensity both increase

The width and intensity both decrease

The width is unchanged but intensity decreases

The width increases but the intensity decreases

6 / 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.

7 / 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

8 / 10

An experiment is set up as shown above, with two speakers connected to the same signal generator and switched on. At what points is the path difference an integer?

A, C and E

B and D

A and E

A, B, C, D and E

9 / 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

10 / 10

Select on the diagram which arrow represents the wavelength of the 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

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%

2 / 10

Identify the independent variable: How does the length of a wire affect the current in the circuit?

Type of wire

Length of wire

Current

3 / 10

Which unit measures work?

watts

joules

volts

4 / 10

Chen Ruolin and Liu Huixia won Gold for China at the 2016 Rio Olympics for their synchronised 10 m platform dive. They have a mass difference of 9 kg but hit the water at the same time, which Newtonian Law applies, if any?

Newton's First Law

Newton's Second Law

Newton's Third Law

None

5 / 10

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

JA^-1t^-1

JAt

J^-1At

JAt^-1

6 / 10

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

V_out increases.

V_out decreases.

V_out remains constant.

7 / 10

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

V_out increases.

V_out decreases.

V_out remains constant.

8 / 10

Plotting a graph of V against I, what is the gradient equal to?

-r

-Ɛ

9 / 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

10 / 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

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 74235.44 to 3 significant figures.

74000

74000.000

74200

74200.000

3 / 10

How many significant figures are in 0.056?

4 / 10

Which is the SI unit for mass?

gram

kilogram

metric tonne

5 / 10

Which is the SI unit for temperature?

kelvin

celsius

fahrenheit

6 / 10

What multiple of unit does nano (n) have?

1 x 10^-6

1 x 10^-9

1 x 10 ^-12

7 / 10

Identify the independent variable: Investigating the absorption of gamma radiation by lead

Radiation Source

Thickness of Lead

Count rate of radiation

8 / 10

Estimate the area under the graph shown above

0.047

0.094

0.192

192

9 / 10

How could you reduce percentage uncertainty?

Take multiple measurements and find an average.

Measure larger quantities.

Measure smaller quantities.

Use equipment with a larger uncertainty value.

10 / 10

Calculate the percentage uncertainty of line c (dashed).

4.3%

5.9%

11.4%

54.6%

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 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

The diagram shows Harry and Dudley on a see-saw. Harry is sat 120 cm away from the pivot. How far away from the pivot must Dudley sit to balance with Harry?

46 cm

55 cm

46 m

55 m

4 / 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

5 / 10

The SI unit for a Newton is _______ .

kgs^-1

kgms^-1

kgms^-2

6 / 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

7 / 10

A student moves a table in class by pushing it at an angle of 11° with a force of 200 N. Calculate the vertical component.

38.1 N

38.2 N

196.3 N

196.4 N

8 / 10

Select the graph which best fits the motion of a pogo stick being bounced on at regular intervals.

9 / 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

10 / 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

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

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

V_out increases.

V_out decreases.

V_out remains constant.

2 / 10

Calculate the current at A₂ in the circuit shown.

0.15 A

0.21 A

0.36 A

0.51 A

3 / 10

Calculate the total resistance of the circuit shown.

0.69 Ω

4 Ω

8 Ω

16 Ω

4 / 10

A battery of e.m.f. 1.5 V with an internal resistance of 0.5 Ω is connected in series to a 5 Ω resistor. Calculate the current in the circuit.

0.12 A

0.25 A

0.4 A

3.6 A

5 / 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

6 / 10

Select the missing word: "The more charge carries available, the greater the current therefore the resistance ___________.

Increases

Decreases

Stays the same

Remains at zero

7 / 10

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

8 / 10

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

R/2

R²

9 / 10

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

0 V

3.6 V

6 V

8.4 V

10 / 10

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

2 V

4 V

8 V

0 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

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

2 / 10

Which material is the densest?

3 / 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

4 / 10

When investigating Young's modulus, why should you use a long wire?

To help maintain social distancing.

To reduce the absolute uncertainty in your measurements.

To reduce the percentage uncertainty in your measurements.

To reduce random errors.

5 / 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

6 / 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

7 / 10

A stress-strain graph is shown above for an unknown material. Where on the curve would you mark the UTS point?

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

Which is the correct chronological of discoveries from these scientists?

Newton, Planck, Hertz and Hallwachs, Young

Young, Newton, Planck, Hertz and Hallwachs

Newton, Young, Planck, Hertz and Hallwachs

Newton, Young, Hertz and Hallwachs, Planck

2 / 10

Electrons are accelerated through a potential difference of 230 V. Calculate their velocity.

3.68x10^-7 ms^-1

21 ms^-1

8.89x10⁷ ms^-1

7.91x10¹³ ms^-1

3 / 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.

4 / 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.

5 / 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.

6 / 10

In a fibre optic cable the core has a refractive index of 1.52 and it's cladding is 1.34. Calculate the critical angle at the boundary between the core and cladding of the cable.

0.02°

41.1°

44.7°

69.1°

7 / 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°

8 / 10

Why is cladding is required in fibre optics?

Avoid the loss of signal

Required to ensure total internal reflection

Protect the cable from damage

All of the above

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

Select the wave with the highest frequency.

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

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.

3 / 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

4 / 10

Which material on the graph above is the strongest?

5 / 10

Which material on the graph above is the stiffest?

6 / 10

A stress-strain graph is shown above for an unknown material. Where on the curve would you mark the UTS point?

7 / 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

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

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

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

JA^-1t^-1

JAt

J^-1At

JAt^-1

2 / 10

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

WA²

WA^-1

WA^-2

3 / 10

Select a use for this circuit in fluctuating light conditions. 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.

4 / 10

Calculate the current at A₃ in the circuit shown.

0.55 A

1.37 A

1.43 A

1.5 A

5 / 10

Which of these circuit symbols represents an LDR?

6 / 10

Which of these circuit symbols represents a thermistor?

7 / 10

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

8 / 10

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

R/2

R²

9 / 10

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

Ammeter

Voltmeter

Luxmeter

Newton Meter

10 / 10

Silver has 7.9x10²⁸ free electrons per m³. Calculate the mean drift velocity of the electrons in a piece of silver wire that has a cross-sectional area of 3.2x10^-3 m² when a current of 13A is flowing.

5.26x10^-8 ms^-1

3.21x10^-7 ms^-1

4.04x10⁷ ms^-1

5.26x10⁸ ms^-1

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

The Space Shuttle has a mass of 2.03x10⁶ kg. Upon launch, it has two Solid Rocket Boosters (SRB) providing 12,000 kN of thrust in 123 s. It uses the SRB's to ascend to an altitude of 46 km before jetsoning them. Calculate the Space Shuttle's velocity. Ignore any change in mass due to spent fuel. g = 9.81 ms^-2

53.9 ms^-1

214.5 ms^-1

374.0 ms^-1

950.0 ms^-1

3 / 10

A crane lifts a Rolls-Royce Trent 1000 engine into place. The engine has a mass of 5,936 kg and is lifted vertically 10 m by the crane in 12 seconds. Calculate the power of the crane. g = 9.81 Nkg^-2.

4.85x10⁴ W

6.99x10⁴ W

5.82x10⁵ W

6.99x10⁵ W

4 / 10

You can feel your phone in your hand, which Newtonian Law applies, if any?

Newton's First Law

Newton's Second Law

Newton's Third Law

None

5 / 10

The complete Harry Potter collection in paperback has a mass of 3.4 kg. The book collection is placed on a sloping table at angle θ and is at rest. The maximum frictional force between the tabletop and the book collection is 17.7 N.

Calculate the minimum angle at which the book collection will slip. g = 9.81 Nkg^-2.

31°

48°

57°

59°

6 / 10

1.72 m

2.98 m

18.23 m

31.58 m

7 / 10

A flask of coffee is knocked horizontally from the roof of a car 1.45 m off the ground at 14 ms^-1. Calculate how long it takes to reach the ground. g_Earth = 9.81 ms^-2

0.10 s

0.21 s

0.30 s

0.54 s

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

A sandwich falls from an Air Traffic Control (ATC) tower of height 102 m. How long will it take to hit the ground?

3.22 s

4.56 s

10.39 s

20.79 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 0.056?

2 / 10

Which unit measures force?

Newtons

kilograms

pascals

3 / 10

Which unit measures electric potential difference?

amperes

volts

ohms

4 / 10

Calculate the gradient of the graph shown.

-1.28

-0.80

1.28

2.32

5 / 10

The area under this graph has a value of 100. Select the correct unit.

ms^-1

ms^-2

6 / 10

Calculate the area under the graph shown above.

67.5

87.5

104.5

7 / 10

How could you reduce percentage uncertainty?

Take multiple measurements and find an average.

Measure larger quantities.

Measure smaller quantities.

Use equipment with a larger uncertainty value.

8 / 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

9 / 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%

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

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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