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

Calculate the gradient of the graph shown.

0.25

0.4

0.6

1.2

2 / 10

A bullet of mass 4.02 g is fired at a speed of 940 ms^-1 from an SA-80 rifle. The bullet strikes a block of hardwood of mass 0.512 kg hanging at rest from a long string. The bullet enters the wood and becomes lodged in the block. Calculate the initial speed the wooden block from rest immediately after impact.

1.28 ms^-1

1.84 ms^-1

7.3 ms^-1

73.2 ms^-1

3 / 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

4 / 10

A cyclist has a constant negative acceleration as approaches a café. She takes 5.5 seconds to come to a complete stop and travels 26 m. Calculate her initial speed.

4.73 ms^-1

9.54 ms^-1

11.96 ms^-1

143.00 ms^-1

5 / 10

Calculate the current at A₁ in the circuit shown.

0.13 A

1.37 A

2.05 A

2.93 A

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

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.

8 / 10

Which lens causes light to diverge?

Convex

Concave

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

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

The wavelength of the electrons can be measured by diffraction. An electron gun accelerates electrons into a beam, these were diffracted and upon diffraction the wavelength was found to be 1.23×10^-9m. Calculate the potential difference used to accelerate the electrons from rest into a beam.

1.59x10^-19 V

3.89x10^-5 V

0.997 V

5.91x10⁵ V

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

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

A focal point for a concave lens is 150 mm away from the lens. An object is then placed 7.5 cm from the lens. Calculate the distance the image is from the lens.

7.89 mm

78.94 mm

18.75 mm

187.5 mm

5 / 10

The speed of light in the core of a fibre optic cable is 2.04x10⁸ ms^-1. Calculate the refractive index.

0.68

1.27

1.47

6 / 10

This image shows a cross section of fibre optic cable. Select why the ray enters the cladding.

The angle of incidence is greater than the critical angle

The angle of incidence is less than the critical angle

The angle of refraction is greater than the critical angle

The angle of refraction is less than the critical angle

7 / 10

This diagram shows a ray of light travelling through a semi-circular glass block. Which letter would represent the critical angle if TIR occurred?

8 / 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

9 / 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

10 / 10

Polarisation only occurs with which type of waves?

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 is the SI unit for temperature?

kelvin

celsius

fahrenheit

2 / 10

Select the SI unit for Work.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

3 / 10

A ball bearing is dropped in various mediums with various densities. Select the graph that shows the ball bearing dropped in a vacuum.

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

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

6 / 10

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

Scalar

Vector

7 / 10

Which graph best represents the resistance of an NTC thermistor?

8 / 10

Which way does current flow in a circuit?

Negative to positive

Positive to negative

Clockwise

Anti-clockwise

9 / 10

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

Wave

Particle

10 / 10

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

Focal length

Principal length

Lens length

Real length

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 100?

2 / 10

What is 3.1415 to 1 significant figure.

3.1

3.10

3.14

3 / 10

Which is the SI unit for mass?

gram

kilogram

metric tonne

4 / 10

What multiple of unit does kilo (k) have?

1 x 10³

1 x 10⁶

1 x 10 ⁹

5 / 10

What multiple of unit does deci (d) have?

1 x 10^-1

1 x 10¹

1 x 10 ²

6 / 10

Select the correct definition for the phrase "Control Variable"

what is changed in an investigation

what is kept the same

what is measured

7 / 10

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

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

9 / 10

Estimate the area under the graph shown above

0.047

0.094

0.192

192

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

Select the SI unit for Energy.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

2 / 10

The Soyuz (Russian: Сою́з) descent module, of mass 2900 kg, re-enters the atmosphere at an angle of 1.35° to the horizontal, and travels 4200 km until it reaches 10.7 km before deploying it's parachutes. Calculate the change in E_g from the point of atmospheric re-entry to parachute deployment.

2.5x10⁶ J

2.5x10⁹ J

1.2x10¹¹ J

1.2x10⁸ J

3 / 10

A ball bearing is dropped in various mediums with various densities. Select the graph that shows the ball bearing dropped in a vacuum.

4 / 10

Samantha Cristoforetti is an Italian astronaut. We can't find her mass online, so let's assume 60 kg. Where does she weigh the most at?

Venus

Earth

International Space Station (ISS)

Mars

5 / 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

6 / 10

A cyclist has a constant negative acceleration as approaches a café. She takes 5.5 seconds to come to a complete stop and travels 26 m. Calculate her initial speed.

4.73 ms^-1

9.54 ms^-1

11.96 ms^-1

143.00 ms^-1

7 / 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

8 / 10

A fishing boat travels at 4.6 ms^-1 200° from North towards Whitehaven Harbour Gates, which are 9.4 km away. The boat reaches the harbour, stops and the captain get on her bike and cycles due West from the Harbour Gates at 20 kmph for 25 minutes. Calculate her total displacement.

5.12 km

8.33 km

10.21 km

17.73 km

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: length

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 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 potential difference at V₁ in the circuit shown.

4.36 V

7.65 V

8.72 V

12 V

3 / 10

Calculate the current at A₂ in the circuit shown.

0.13 A

0.75 A

1.5 A

2.5 A

4 / 10

The current at A₁ is 4 A and the current at A₂ is 1 A. Select the current at A₃.

1 A

2 A

3 A

4 A

5 / 10

Which of these circuit symbols represents an LDR?

6 / 10

Which graph best represents the resistance of an NTC thermistor?

7 / 10

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

8 / 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.

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

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

Materials Random Retrieval

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

1 / 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.

2 / 10

Which diagram is showing laminar flow?

3 / 10

A 4.2 g balloon is inflated with 1.8 g of air until it is 1.4x10^-3 m³ in volume. Calculate the density of the inflated balloon.

1.3 kgm^-3

3.0 kgm^-3

4.3 kgm^-3

8.4 kgm^-3

4 / 10

Which material is the densest?

5 / 10

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

elastic limit.

limit of proportionality.

yield point.

breaking point.

6 / 10

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.

7 / 10

Which material on the graph above is the strongest?

8 / 10

Select the graph with the correct labels.

9 / 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

10 / 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

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 Photoelectric Effect is an example of light as a __________.

Wave

Particle

2 / 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.

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

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

5 / 10

A diffraction grating has 350 slits per metre, what the slit spacing, d?

¹/₃₅₀

175

350

700

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 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

8 / 10

A sound wave of wavelength 0.332 m has a time period of 10^-3s. If the time period is decreased to 10^-4 s. Calculate the wavelength of the new wave.

0.332 cm

3.32 cm

33.2 cm

333 cm

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 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

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

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

Nkg^-1

Nms^-1

Nkgm^-1

Nsm^-2

3 / 10

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

4 / 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.

5 / 10

Which material on the graph above is the weakest?

6 / 10

Select the graph with the correct labels.

7 / 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

8 / 10

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

When the limit of proportionality has been passed.

When the elastic limit has been passed.

When a metallic material is used.

When synthetic material is used.

9 / 10

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

10 / 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.

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:

CΩ^-1s^-1

ΩC^-1s^-1

CΩs

CΩs^-1

2 / 10

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

JΩC^-1

J^-1ΩC

JΩ^-1C^-1

JΩ^-1C

3 / 10

Calculate the current at A₂ in the circuit shown.

0.13 A

0.75 A

1.5 A

2.5 A

4 / 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

5 / 10

Which graph best represents the resistance of an NTC thermistor?

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 NTC thermistor?

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

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 number of charge carriers doubles?

I/2

I²

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

You're down the allotment and are carrying your 65 kg Nana in a 20kg wheelbarrow. Your Nana's and the wheelbarrow's weight acts 60 mm from the centre of the wheel. What force do you need to apply to the end of the handle, 1.2 m from the centre of the wheel, to move your Nana about? g = 9.81 ms^-2

9.8 N

31.9 N

41.7 N

50.3 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

The Shenzhou (Chinese: 神舟) re-entry capsule has a of mass 7840 kg falling through the atmosphere at a steady velocity of 1.75x10⁴ Mph. Calculate its kinetic energy. g = 9.81 ms^-2, 1 Mile = 1.6 km

3.05x10⁷ J

2.37x10¹¹ J

1.19x10¹² J

1.19x10¹⁵ J

4 / 10

Select the SI unit for Work.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

5 / 10

Samantha Cristoforetti is an Italian astronaut. We can't find her mass online, so let's assume 60 kg. Where does she weigh the most at?

Venus

Earth

International Space Station (ISS)

Mars

6 / 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

7 / 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.

8 / 10

Estimate the displacement shown on this velocity-time graph for a Y7 trying to find a classroom during their first week in secondary.

36 m

45 m

60 m

63 m

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 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

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 100.249 to 2 decimal places.

100.00

100.20

100.25

100.30

2 / 10

What is 1291 to 2 significant figures.

1000

1200

1290

1300

3 / 10

Which is the SI unit for temperature?

kelvin

celsius

fahrenheit

4 / 10

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

kilogram

mole

litre

5 / 10

Which unit measures electric potential difference?

amperes

volts

ohms

6 / 10

What multiple of unit does kilo (k) have?

1 x 10³

1 x 10⁶

1 x 10 ⁹

7 / 10

What multiple of unit does tera (T) have?

1 x 10⁹

1 x 10¹²

1 x 10 ¹⁵

8 / 10

What multiple of unit does deci (d) have?

1 x 10^-1

1 x 10¹

1 x 10 ²

9 / 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

10 / 10

Calculate the gradient of the graph shown.

-1.28

-0.80

1.28

2.32

Your score is

U11.1 – The 4 Types of Nuclear Radiation

102

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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