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

30 ± 1.50% N

30 ± 3.12% N

30 ± 8.17% N

30 ± 10.01% N

2 / 10

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

3 / 10

A nurse journeys through a hospital ward on a crash call. From a stationary position, he takes 16 seconds to complete the 60 m corridor. Calculate his acceleration.

0.47 ms^-2

1.88 ms^-2

3.75 ms^-2

7.50 ms^-2

4 / 10

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

WA²

WA^-1

WA^-2

5 / 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 mean drift velocity of charge carriers halves?

I/2

I²

6 / 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

7 / 10

Which material is the densest?

8 / 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.

9 / 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

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

Waves and the Nature of Light Random Retrieval

Waves & the Nature of Light Random Retrieval

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

1 / 10

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

Wave

Particle

2 / 10

The Photoelectric Effect is an example of light as a __________.

Wave

Particle

3 / 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

4 / 10

Complete the sentence: "When waves pass from one medium to another, if the mediums have similar densities then most of the energy is ____________."

reflected

absorbed

scattered

transmitted

5 / 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°

6 / 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

7 / 10

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

Real

Virtual

8 / 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°

9 / 10

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

13.6 Hz

85 Hz

1360 Hz

8.5 kHz

10 / 10

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

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

30 ± 1.50% N

30 ± 3.12% N

30 ± 8.17% N

30 ± 10.01% N

2 / 10

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

kilogram

mole

litre

3 / 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

4 / 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

5 / 10

Which is the correct definition for acceleration?

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.

6 / 10

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

Ammeter

Voltmeter

Luxmeter

Newton Meter

7 / 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.

8 / 10

Which material is the densest?

9 / 10

What is Young's modulus a measure of?

The ductility of a material.

The tensile strength of a material.

The stiffness of a material.

The brittleness of a material.

10 / 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

Your score is

Working as a Physicist Random Retrieval

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

1 / 10

What is 74235.44 to 3 significant figures.

74000

74000.000

74200

74200.000

2 / 10

How many significant figures are in 0.056?

3 / 10

Which is the SI unit for length?

millimetre

metre

astronomical unit

4 / 10

Select the correct definition for the phrase "Independent Variable"

what is changed in an investigation

what is kept the same

what is measured

5 / 10

Identify the dependent variable: Investigating the braking distance of different cars.

Type of car

Braking distance

Road surface

6 / 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

7 / 10

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

Js^-1

As^-1

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

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.

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 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

2 / 10

Shoaib Akhtar is the fastest bowler ever. He throws a cricket ball of 163 g at a speed of 161.3km h^-1 which strikes a stationary cricket bat. Calculate the momentum of the ball before the collision.

7.3 kg ms^-1

26.3 kg ms^-1

1.6x10⁴ kg ms^-1

7.3x10⁴ kg ms^-1

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

A mass of 3 kg is hung on a forcemeter then dropped from the top of a building 10m high. Select the reading shown on the balance while the mass and the balance are falling together. g = 9.81 ms^-2.

0 N

3 N

29 N

294 N

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

A game of tug of war occurs between the English and Mathematics departments. The English department pull westerly with a force of 120.50 N and the Mathematics department pull easterly with a force of 108.25 N.

Calculate who wins and with what resultant force.

Mathematics with a resultant force of 11.1 N

Mathematics with a resultant force of 12.25

English with a resultant force of 11.1 N

English with a resultant force of 12.25

7 / 10

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

8 / 10

A bride excitedly throws a bouquet of flowers behind her back at 12 ms^-1 her wedding at an angle of 45°. They are released from a height of 2.1 m and are caught just off the floor by her best man Sam.

Calculate how far away Sam was stood. g_Earth = 9.81 ms^-2

3 m

10 m

11 m

17 m

9 / 10

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

Scalar

Vector

10 / 10

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

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 current is the ampere. A correct alternative unit is:

JΩC^-1

J^-1ΩC

JΩ^-1C^-1

JΩ^-1C

2 / 10

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

JA^-1t^-1

JAt

J^-1At

JAt^-1

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

The current at A₁ is 4 A and the current at A₂ is 1 A. Select the current at A₄.

1 A

2 A

3 A

4 A

5 / 10

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

Expression A

Expression B

Expression C

Expression D

6 / 10

The unit for resistance is Ohms, what is this in SI base units?

kg s^-2 A^-1

m^-2 kg^-1 s⁴ A²

m² kg s^-3 A^-1

m² kg s^-3 A^-2

7 / 10

Which of the following options is the unit for resistivity?

Ωm

Ω²

Ωm²

8 / 10

A 50 Ω resistor in an electric circuit has a potential difference across it of 20 V. Calculate the current through the resistor.

0.4 A

1 A

2.5 A

1 kA

9 / 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.

10 / 10

A battery delivers 5.2 x10³ C of electric charge to a circuit in 12 minutes. Calculate the current.

0.14 A

7.22 A

3.74x10⁶ 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

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 diagram is showing laminar flow?

3 / 10

Which material is the densest?

4 / 10

A unknown material under load 75 N incurs an extension of 2.1 mm. The original length of the material was 1.75 m and it has a diameter of 0.45 mm. Which material is it most likely to be?

Acrylic

Gold

Nickel

Tungsten

5 / 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

6 / 10

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

4.0 J

5.85 J

6.75 J

11.7 J

7 / 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

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

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

10 / 10

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

is plastic.

will shear under high loads.

will not return to its original shape.

will return to its original shape.

Your score is

Waves & the Nature of Light Random Retrieval

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

1 / 10

The h in E = hf represents:

Number of photons

Planck constant

Boltzmann constant

Intensity of light

2 / 10

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°

3 / 10

Where is the brightest maxima located?

zero order

1st order

2nd order

nth order

4 / 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

5 / 10

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

6 / 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

7 / 10

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

Constructive interference

Destructive interference

None

8 / 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%

9 / 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

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

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

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

6.7x10⁵ N

6.9x10⁸ N

7.1x10⁸ N

7.1x10¹¹ N

3 / 10

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.

4 / 10

Which diagram is showing laminar flow?

5 / 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

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

Which material on the graph above is the stiffest?

8 / 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

9 / 10

At which point on the graph shown above is the elastic limit?

10 / 10

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

is plastic.

will shear under high loads.

will not return to its original shape.

will return to its original shape.

Your score is

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

Calculate the potential difference at V₁ in the circuit shown.

4.36 V

7.65 V

8.72 V

12 V

2 / 10

Calculate the current at A₃ in the circuit shown.

0.55 A

1.37 A

1.43 A

1.5 A

3 / 10

The current at A₁ is 4 A and the current at A₂ is 1 A. Select the current at A₄.

1 A

2 A

3 A

4 A

4 / 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

5 / 10

An electric motor is used to raise a load. When the switch is closed, the ammeter reads 94 mA and the motor raises a 568 g load through a height of 174 cm in 25 seconds. Calculate the potential difference of the circuit assuming it is 100% efficient. g = 9.81 N kg⁻¹

9.7 V

36.8 V

103.1 V

109.7 V

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

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

8 / 10

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

9 / 10

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

Ammeter

Voltmeter

Oscilloscope

Newton Meter

10 / 10

A smart phone has a charge flowing through it of 2 mC every 5 s. Calculate the current.

0.4 A

0.01 A

4x10^-3 A

1x10^-3 A

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 window cleaner leans her ladder against a vertical wall in order to start work. The ladder has a length of 6 m and mass of 15 kg, she places it at an angle of 50°. Calculate the reaction force from the wall at W. g=9.81 ms_-2

8.9 N

61.7 N

87.7 N

123.5 N

2 / 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

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

Calculate who wins and with what resultant force.

Mathematics with a resultant force of 11.1 N

Mathematics with a resultant force of 12.25

English with a resultant force of 11.1 N

English with a resultant force of 12.25

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

Estimate the velocity between 2 s and 6 s on the graph shown.

0.75 ms^-1

1.00 ms^-1

1.25 ms^-1

1.50 ms^-1

7 / 10

Calculate how far away Sam was stood. g_Earth = 9.81 ms^-2

3 m

10 m

11 m

17 m

8 / 10

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

27 m

59 m

117 m

706 m

9 / 10

Which is the SI unit for acceleration?

ms^-1

ms^-2

m^-1

10 / 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

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 is the SI unit for time?

hour

parsec

second

3 / 10

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

kilogram

mole

litre

4 / 10

Which unit measures electrical resistance?

ohms

volts

farads

5 / 10

What multiple of unit does mega (M) have?

1 x 10⁶

1 x 10⁹

1 x 10 ¹²

6 / 10

What is 100 MW in gigawatts?

10 GW

1 GW

0.1 GW

7 / 10

Select the correct definition for the phrase "Control Variable"

what is changed in an investigation

what is kept the same

what is measured

8 / 10

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

ms^-1

ms^-2

9 / 10

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

30 ± 1.50% N

30 ± 3.12% N

30 ± 8.17% N

30 ± 10.01% N

10 / 10

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

129

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

130

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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