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 area under the graph shown above.

67.5

87.5

104.5

2 / 10

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

3 / 10

Which is the SI unit for current?

volts

ampere

joule

4 / 10

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

5 / 10

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

Ammeter

Voltmeter

Oscilloscope

Newton Meter

6 / 10

A copper wire of diameter 0.6 mm, X, is joined in series to the end of another copper wire of diameter 0.125 mm, Y. Both wires are 80 cm in length when no load is applied. A 15 N load is hung on the end of the wires as shown in the diagram below. If the Young's Modulus of copper is 128 GPa, calculate the extension for each wire.

ExtensionX = 0.3 mm, ExtensionY = 7.6 mm

ExtensionX = 0.4 mm, ExtensionY = 9.5 mm

ExtensionX = 1.4 mm, ExtensionY = 1.6 mm

ExtensionX = 2.3 mm, ExtensionY = 11.9 mm

7 / 10

Which phenomenon is not an example of light as a wave?

Diffraction

Reflection

Photoelectric effect

Polarisation

8 / 10

Electrons can show can show wave light properties.

TRUE

FALSE

9 / 10

Where is the brightest maxima located?

zero order

1st order

2nd order

nth order

10 / 10

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

Real only

Virtual only

Both real and virtual

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 h in E = hf represents:

Number of photons

Planck constant

Boltzmann constant

Intensity of light

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

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.

4 / 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°

5 / 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

6 / 10

Two points on a wave have a phase difference of 1080°, are they in phase?

Yes

No - they are out of phase

No - they are exactly out of phase

7 / 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%

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

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

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

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

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

2 / 10

A scuba diver surfaces after a dive. She begins to swim towards the boat at a constant speed of 67 cms^-1 and due to a current in the water this takes her 70 seconds an an angle of 32°. Calculate the time taken if there was no current at the same speed.

40 s

47 s

59 s

67 s

3 / 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

4 / 10

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

Scalar

Vector

5 / 10

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

V_out increases.

V_out decreases.

V_out remains constant.

6 / 10

A light bulb of resistance 600 Ω is powered by a 230 V supply. Calculate the power rating of the bulb.

0.4 W

2.6 W

88.2 W

600.0 W

7 / 10

A head torch used on a D of E expedition is rated at 3W with a 3.7 V battery, how many electrons pass through in the 5 minutes it takes for a return trip to campsite bathroom at night?

5.07x10¹⁸ electrons

1.30x10¹⁹ electrons

3.04x10²⁰ electrons

1.52x10²¹ electrons

8 / 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

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

On a stationary wave, where is there maximum vibration.

Nodes

Antinodes

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 3.1415 to 1 significant figure.

3.1

3.10

3.14

2 / 10

Which unit measures force?

Newtons

kilograms

pascals

3 / 10

What multiple of unit does kilo (k) have?

1 x 10³

1 x 10⁶

1 x 10 ⁹

4 / 10

What multiple of unit does deci (d) have?

1 x 10^-1

1 x 10¹

1 x 10 ²

5 / 10

What is 3.2 cm in nanometres?

3.2 x 10^-3 nm

3.2x10⁷ nm

3.2 x 10^-9 nm

6 / 10

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

Type of car

Braking distance

Road surface

7 / 10

Select the graph that best represents a directly proportional relationship.

8 / 10

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

ms^-1

ms^-2

9 / 10

Select the missing word: _______ errors affect precision.

Random

Systematic

10 / 10

The radius of a cheesecake in the staff room is 7.5 ±0.5 cm, what is the percentage uncertainty for the area of the cheesecake?

3.34%

6.67%

13.34%

44.49%

Your score is

Mechanics Random Retrieval

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

1 / 10

If an object is on its pivot, what can be said about the moments?

The total clockwise moment about the pivot is greater than the total anticlockwise moment about the pivot.

The total clockwise moment about the pivot is less than the total anticlockwise moment about the pivot.

The total clockwise moment about the pivot is equal to the total anticlockwise moment about the pivot.

The total clockwise moment about the pivot is twice as large as the total anticlockwise moment about the pivot.

2 / 10

A 75 N force is applied to the end of a spanner that is 25 cm long. Calculate the size of the moment?

1.875 Nm

18.75 Nm

187.5 Nm

1875 Nm

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

A bungee jumper of mass 74 kg, falls 68.5 m before the bungee cord begins to stretch. Calculate the gravitational potential energy lost by the bungee jumper in falling 68.5 m. g = 9.81 Nkg^-1.

4.97x10⁴ J

5.07x10⁴ J

4.97x10⁵ J

5.07x10⁵ J

5 / 10

This graph shows the velocity of a skydiver during a jump. Select the sentence which best describes his motion.

The skydiver jumps from the plane and accelerates to their terminal velocity. They then deploy a smaller parachute to slow them down, before deploying their larger parachute and landing.

The skydiver jumps from the plane and accelerates to their terminal velocity. They change their body shape to a less aerodynamic shape, increasing their drag before reverting to their original position. They then deploy their parachute and land.

The skydiver jumps from the plane and accelerates to their terminal velocity. They change their body shape to a less aerodynamic shape (X), increasing their drag before reverting to their original position. They change their body shape back to X before landing.

The skydiver jumps from the plane and accelerates to their terminal velocity. They change their body shape to a less aerodynamic shape (X), but get caught in a gust of wind which pushes them back up into the sky. Then they deploy their parachute before landing.

6 / 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

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

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

9 / 10

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

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 light intensity decreases on this 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.

0.15 A

0.21 A

0.36 A

0.51 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

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

6 / 10

Select the missing word: "The shallower the gradient of a I-V characteristic graph, the ____________ the resistance of the conductor.

Smaller

Larger

Weaker

7 / 10

A resistor in a circuit has a current through it of 0.20 A when the potential difference across it is 15 V. Calculate the resistance of the resistor.

0.013 Ω

3 Ω

75 Ω

130 Ω

8 / 10

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

0 V

3.6 V

6 V

8.4 V

9 / 10

A microwave runs off the mains in the U.K. and has an efficiency of 98%. Calculate how much electric charge will pass through the microwave per second if it transfers 1.31kJ of energy.

5.58 C

5.70 C

5.81 C

5.94 C

10 / 10

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

Ammeter

Voltmeter

Oscilloscope

Newton Meter

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 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.

4 / 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

5 / 10

Which diagram is showing laminar flow?

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

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

9 / 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

10 / 10

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

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

The electromagnetic spectrum is an example a ____________.

Transverse wave

Longitudinal wave

3 / 10

Which phenomenon is not an example of light as a wave?

Diffraction

Reflection

Photoelectric effect

Polarisation

4 / 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.

5 / 10

Diffraction is an example of light behaving as a __________.

Particle

Wave

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

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

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 the wave with the smallest amplitude.

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

6.7x10⁵ N

6.9x10⁸ N

7.1x10⁸ N

7.1x10¹¹ N

3 / 10

Which material on the graph above is the stiffest?

4 / 10

Which material on the graph above is the weakest?

5 / 10

Select the graph with the correct labels.

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 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.

8 / 10

Estimate k from the graph shown above.

3.75 Nm^-1

5 Nm^-1

37.5 Nm^-1

50 Nm^-1

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

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

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 power is the watt. A correct alternative unit is:

VCs^-1

Ω²V^-2

V²Ω

V²Ω^-2

2 / 10

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

V_out increases.

V_out decreases.

V_out remains constant.

3 / 10

Calculate the potential difference at V₁ in the circuit shown.

4.36 V

7.65 V

8.72 V

12 V

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

A light bulb of resistance 600 Ω is powered by a 230 V supply. Calculate the power rating of the bulb.

0.4 W

2.6 W

88.2 W

600.0 W

7 / 10

Which graph best represents the resistance of an NTC thermistor?

8 / 10

Calculate the potential difference of a battery that has 230 J of energy and moves 120 C of charge.

0.52 V

1.92 V

2.76 V

27600 V

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 mean drift velocity of charge carriers halves?

I/2

I²

10 / 10

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

0.13 seconds

4.8 seconds

2 minutes 10 seconds

80 minutes 8 seconds

Your score is

Mechanics Random Retrieval

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

1 / 10

The diagram shows a swing 1.43m long. Matilda has a mass of 35 kg and is released from rest at position A by Miss Honey. Calculate the speed of Matilda at position B.

1.94 ms^-1

3.75 ms^-1

6.5 ms^-1

14.1 ms^-1

2 / 10

A bungee jumper of mass 74 kg, falls 68.5 m before the bungee cord begins to stretch. Calculate the gravitational potential energy lost by the bungee jumper in falling 68.5 m. g = 9.81 Nkg^-1.

4.97x10⁴ J

5.07x10⁴ J

4.97x10⁵ J

5.07x10⁵ J

3 / 10

Physical Disability Rugby League (PDRL) is a format of rugby league for those with impairments. Anthony Seward (Warrington Wolves) has a mass of 70 kg and Sam Zeller (Leeds Rhinos) has a mass of 65 kg. Anthony is at rest and Sam runs towards him at a speed of 8 ms^-1. They move together in the same direction, calculate at what speed.

0 ms^-1. They do not move.

1.45 ms^-1

2.8 ms^-1

3.0 ms^-1

4 / 10

This graph shows the velocity of a skydiver during a jump. Select the sentence which best describes his motion.

The skydiver jumps from the plane and accelerates to their terminal velocity. They then deploy a smaller parachute to slow them down, before deploying their larger parachute and landing.

5 / 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.

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 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

8 / 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

9 / 10

40 s

47 s

59 s

67 s

10 / 10

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

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 103000?

2 / 10

What is 1291 to 2 significant figures.

1000

1200

1290

1300

3 / 10

Which is the SI unit for mass?

gram

kilogram

metric tonne

4 / 10

Which unit measures work?

watts

joules

volts

5 / 10

Which unit measures electrical resistance?

ohms

volts

farads

6 / 10

Which unit measures electric charge?

coulombs

ohms

farads

7 / 10

What multiple of unit does pico (p) have?

1 x 10^-9

1 x 10^-12

1 x 10 ^-15

8 / 10

Select the correct definition for the phrase "Dependent Variable"

what is changed in an investigation

what is kept the same

what is measured

9 / 10

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

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

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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