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

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

Boiling point of liquid

Type of liquid

Volume of liquid

2 / 10

What is 100 MW in gigawatts?

10 GW

1 GW

0.1 GW

3 / 10

Which unit measures pressure?

newtons

kilograms

pascals

4 / 10

Select the SI unit for Energy.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

5 / 10

The International Space Station remains in orbit in space, which Newtonian Law applies, if any?

Newton's First Law

Newton's Second Law

Newton's Third Law

None

6 / 10

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

V_out increases.

V_out decreases.

V_out remains constant.

7 / 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.

8 / 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

9 / 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

10 / 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.

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 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

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

3 / 10

What is the technique used in ultrasound scanning?

Sonar

Pulse-Echo

US-Reflection

Transducing

4 / 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

5 / 10

An small child's toy is 4 cm from a lens with focal length of 6 cm. How far away from the lens is the image formed?

0.67 cm

1.5 cm

2.4 cm

12 cm

6 / 10

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

Real only

Virtual only

Both real and virtual

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

The image above shows two wave fronts before, during and after meeting. What is this an example of?

Constructive interference

Destructive interference

Stationary wave

9 / 10

When two polarised filters have an angle of 45° between their two transmission axes, what is the intensity of the light detected compared to the unpolarised incident light?

25%

50%

100%

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

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

A student places an item onto a balance in order to obtain its mass. They record the mass as 12.54 g. What’s is their absolute uncertainty for the mass reading?

± 0.01 g

± 0.02 g

± 0.1 g

± 0.125 g

2 / 10

What multiple of unit does tera (T) have?

1 x 10⁹

1 x 10¹²

1 x 10 ¹⁵

3 / 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.

4 / 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.

5 / 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

6 / 10

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

Scalar

Vector

7 / 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.

8 / 10

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

R/2

R²

9 / 10

Calculate the current in a circuit when the charge is 24 C over 6 seconds.

2 A

4 A

6 A

8 A

10 / 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?

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

Which unit measures electric charge?

coulombs

ohms

farads

2 / 10

What is 3.2 cm in nanometres?

3.2 x 10^-3 nm

3.2x10⁷ nm

3.2 x 10^-9 nm

3 / 10

Select the correct definition for the phrase "Independent Variable"

what is changed in an investigation

what is kept the same

what is measured

4 / 10

Select the correct definition for the phrase "Control Variable"

what is changed in an investigation

what is kept the same

what is measured

5 / 10

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

6 / 10

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

7 / 10

Select the correct unit for the area under the graph

ms^-2

ms^-1

s^-1

8 / 10

Select the correct unit, derived from SI base units, for the estimated area under the graph.

Js^-1

As^-1

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

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

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

The diagram shows four different combinations of a baby’s mobile with four different weights: 1 N, 2 N, 3 N and 4 N. All the stars are horizontally 50 mm apart. Select the mobile that would be perfectly balanced.

3 / 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

4 / 10

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

in the opposite direction as

perpendicular to

in the same direction as

irrelevant to

5 / 10

Select the statement that best describes the motion of object as shown in the graph above.

Object is travelling at constant velocity.

Object is stationary.

Object is accelerating constantly.

Object is changing acceleration.

6 / 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

7 / 10

A school decided to go paintballing for staff team building. The Head of Science aims her paintball gun horizontally 1.6 m above ground at the Headteacher, launching the paintball at 92 ms^-1. She hits him on his thigh, 90cm from the ground. Calculate the distance away the Headteacher was stood. g_Earth = 9.81 ms^-1

34.8 m

39.4 m

52.5 m

65.7 m

8 / 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

9 / 10

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

Scalar

Vector

10 / 10

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

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

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.

2 / 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.

3 / 10

Calculate the current at A₁ in the circuit shown.

0.13 A

1.37 A

2.05 A

2.93 A

4 / 10

Calculate the total resistance of the circuit shown.

0.62 Ω

1.6 Ω

5 Ω

15 Ω

5 / 10

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

Expression A

Expression B

Expression C

Expression D

6 / 10

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

R/2

R²

7 / 10

What would be the n value of a perfect insulator?

Very small

8 / 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

9 / 10

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

Ammeter

Voltmeter

Oscilloscope

Newton Meter

10 / 10

Calculate the current in a circuit when the charge is 24 C over 6 seconds.

2 A

4 A

6 A

8 A

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

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

2 / 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.

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

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

5 / 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

6 / 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.

7 / 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

8 / 10

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

9 / 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.

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

Select the correct description of an absorption line spectrum.

Continuous dull spectrum with white lines across it.

Continuous dull spectrum with dark lines across it.

Continuous bright spectrum with white lines across it.

Continuous bright spectrum with dark lines across it.

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

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

4 / 10

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

Focal length

Principal length

Lens length

Real length

5 / 10

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

Real only

Virtual only

Both real and virtual

6 / 10

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

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

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

Two coherent, in phase waves have a path difference of 3λ. What kind of interference occurs?

Constructive interference

Destructive interference

None

10 / 10

Calculate the frequency of a wave travelling at 500 ms^-1 with a wavelength of 25 m.

0.05 Hz

20 Hz

1.25 kHz

12.5 kHz

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

Which material is the densest?

3 / 10

Which material on the graph above is the stiffest?

4 / 10

Which material on the graph above is the weakest?

5 / 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

6 / 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

7 / 10

What is another term for tensile deformation?

Extension

The Limit of Proportionality

Compression

The Elastic Limit

8 / 10

A meteor traveling through space has a k = 4.2x10⁶ Nm^-1 and a force of 5x10⁸ N. Calculate the extension of the meteor.

8.4x10^-3 m

8.4 m

11.9 m

119.0 m

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

AmV^-1

VmA^-1

VAm^-1

Am^-1V^-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 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.

4 / 10

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

V_out increases.

V_out decreases.

V_out remains constant.

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 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

7 / 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

8 / 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

9 / 10

Which of the following options is the unit for resistivity?

Ωm

Ω²

Ωm²

10 / 10

What would be the n value of a perfect insulator?

Very small

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 Work.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

2 / 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

3 / 10

The International Space Station remains in orbit in space, which Newtonian Law applies, if any?

Newton's First Law

Newton's Second Law

Newton's Third Law

None

4 / 10

Lauren Steadman set off on her run as part of the paratriathlon at Rio Olympics. Select the best description for her motion.

Her leading foot exerts a force down on the road, so the road exerts an equal and opposite force upwards.

As she places her leading foot down and pushes up at an angle, a gravitational force pulls her back to earth at the same angle moving her forward.

Her leading foot exerts a force forwards to the road. The road exerts an equal and opposite frictional force backwards.

Her leading foot exerts a force backwards to the road. The road exerts an equal and opposite frictional force forward.

5 / 10

Select the best statement for Newton's 3rd Law:

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

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.

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

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

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

8 / 10

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

9 / 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

10 / 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

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 26.794 to 1 decimal places.

26.7

26.8

26.80

27.0

2 / 10

How many significant figures are in 4.00013?

3 / 10

What is 74235.44 to 3 significant figures.

74000

74000.000

74200

74200.000

4 / 10

What is 0.0000176700 to 2 significant figures.

0.000017

0.0000177

0.000018

0.0000180

5 / 10

Which unit measures work?

watts

joules

volts

6 / 10

Which unit measures power?

watts

joules

volts

7 / 10

What multiple of unit does giga (G) have?

1 x 10⁶

1 x 10⁹

1 x 10 ¹²

8 / 10

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

9 / 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

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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