Why would ultraviolet and xray em radiation from the same source reach a point at the same time

They both travel at the speed of light

State Kirchhoff's second law?

The sum of voltages around a closed circuit are zero

State what is meant by the term Longitudinal Wavelength

Ocsillation parallel to the direction of energy transfer

State the Meaning of Coherence

Waves with Constant Phase Difference

Explain what is meant by a photon and state one of its main properties

A quantity of energy with no rest mass

Why is T in kelvin in pV = nRT

as p or V approaches 0, t approaches 0, kelvin is temp scale with this 0

State what is meant by the decay constant of an isotope

Probability of decay of a nucleus per unit time

State what is meant by the term geostationary orbit

An orbit that remains stationary relative to Earths surface

Which equation describes Faraday's Law of Electromagnetic Induction?

\varepsilon=-\frac{N\Delta\Phi}{\Delta t}

Which of these are quantities preserved in a perfectly elastic collision

Lepton number, Momentum, Kinetic energy, Lepton number

Write a suitable word equation to define the resistivity of a material

(Resistance × Cross-sectional Area) / Length

Work done on charge carriers per unit charge

What is Kepler's Third Law?

\text{period}^2\propto\text{radius}^3

What is evidence of the wave-like behaviour of electrons?

Electron diffraction through polycrystaline graphite

What are the properties of a plane polarised wave?

It oscillates in one direction only

What is meant by the term homogeneous?

There is a uniform distribution of matter everywhere in the unvierse

What are the conditions that must be satisfied for a system to be in equilibrium?

The resultant moment about a point is zero, Resultant force is zero

State Newton's second law of motion

Resultant force is directly proportional to the rate of change of momentum

State Archimedes Principle

Upthrust is equal to the weight of fluid displaced

State what is meant by induced nuclear fission

Splitting of a nucleus as a neutron is absorbed

Define the term threshold frequency

minimum frequency of EM radiation to remove electrons

What is meant by the term polarised waves?

Transverse waves oscilating in just one plane

Recession speed of a galaxy DP distance from Earth

State the Cosmological Principle

Universe is isotropic, homogenous, and the laws of physics are universal

Define the term phase difference

Difference in angle between two points on a wave

In context of the photoelectric effect, define work function

The minimum amount of energy required to remove an electron

State Archimedes' principal

Upthrust = weight of fluid displaced

Which condition on two forces is NOT part of Newton's second law.

Along the line between the centres of mass

State the principle of superpostion

The resultant displacement is the sum of the individual displacements

Why can sound waves not be polarised

Longitudinal waves cannot be polarised

A galaxy's velocity away from us is proportional to its distance from us

State Faraday's law of electromagnetc induction

EMF induced in a wire DP rate of change of magnetic flux linkage

What is the internal energy of a substance?

The sum of kinetic and potential energies of the atoms

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13P2 - Definitions Quiz

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Questions 38

Answers

1
Why would ultraviolet and xray em radiation from the same source reach a point at the same time
They travel with the same momentum
They travel with the same energy
They both travel at the speed of sound
They both travel at the speed of light
2
State Kirchhoff's second law?
The sum of voltages around a closed circuit are zero
The energy lost in a component is proportional to its resistance
The sum of current around a closed circuit is zero
The current in a point is equal to the current out of that point
3
State what is meant by the term Longitudinal Wavelength
Ocsillations of electric and magnetic feilds
A wave that can't be polarised by a polarising filter
Ocsillation parallel to the direction of energy transfer
Vibrations perpendicular to the direction of travel
4
What is the definition of precision?
Data is close to the mean
Equipment can detect a small change
Data is close to the true value
Data has lots of decimal places
5
State the Meaning of Coherence
Waves with a Constant Path Difference
Waves with Constant Phase Difference
Waves of the same Frequency and Wavelength
Waves with a Phase Difference of pi/2 or pi
6
Which equation describes Newton's Law of Gravitation?
F=\frac{GM}{r}
F=\frac{GM}{r^2}
F=\frac{GMm}{r}
F=\frac{GMm}{r^2}
7
What is the effect when a metal surface emits photons when a light is shone on it
Photo-eclectic effect
Electron Photon release effect
Photon-Elective effect
Photo-electric effect
8
Explain what is meant by a photon and state one of its main properties
A quantity of energy with no rest mass
A quantity of mass with no rest energy
A quantity of mass with no energy
A quantity of energy with no mass
9
Why is T in kelvin in pV = nRT
SI base unit is used for temp when not change in temp
Boltzman Constant is measured in kelvin^-1
as p or V approaches 0, t approaches 0, kelvin is temp scale with this 0
OCR hates celsius
10
State what is meant by the decay constant of an isotope
ln(2) multiplied by half life of an isotope
Probability of decay of a nucleus
Time taken for the count rate of an isotope to halve
Probability of decay of a nucleus per unit time
11
State what is meant by the term geostationary orbit
An orbit that remains stationary relative to the moons surface
An orbit that remains stationary relative to Earths surface
An orbit that isnt on earth or the moon
An orbit that isnt stationary relative to Earths surface
12
Which equation describes Faraday's Law of Electromagnetic Induction?
\varepsilon=\frac{\Delta\Phi}{\Delta t}
\varepsilon=\frac{N\Delta\Psi}{\Delta t}
\varepsilon=\frac{N\Delta\Phi}{\Delta t}
\varepsilon=-\frac{N\Delta\Phi}{\Delta t}
13
Which of these are quantities preserved in a perfectly elastic collision
Lepton number
Momentum
Kinetic energy
Lepton number
14
Write a suitable word equation to define the resistivity of a material
(Resistance × Cross-sectional Area) / Length
(Length × Resistance) / Cross-sectional Area
(Resistivity × Cross-sectional Area) / Length
(Resistance / Cross-sectional Area) × Length
15
Define EMF
Work done by charge carriers per unit charge
Work done by each charge carrier
Work done on charge carriers per unit charge
Work done on each charge carrier
16
What is Kepler's Third Law?
\text{radius}^2\propto\text{period}^3
\text{frequency}^2\propto\text{period}^3
\text{weight}\propto\text{radius}^{-2}
\text{period}^2\propto\text{radius}^3
17
What is evidence of the wave-like behaviour of electrons?
Electron diffraction through a graphene crystal
Some historial figure (old bloke) said so
Electron diffraction through polycrystaline graphite
Young's double split experiment
18
What are the properties of a plane polarised wave?
It has a constant phase difference
It oscillates in one direction only
It has the same frequency
The oscillation is in the same direction as the energy transfer
19
What is meant by the term homogeneous?
There is a uniform distribution of matter everywhere in the unvierse
a mixture in which the composition is uniform throughout the mixture
Having two identical alleles of a gene, inherited from each parent
The equation only contains the function or its derrivatives.
20
Which two scalar quantities have the same base units?
Impulse and Momentum
Activity and Frequency
Frequency and Wavelength
Moment and Force
21
What are the conditions that must be satisfied for a system to be in equilibrium?
Resultant force is constant
Mass is zero
The resultant moment about a point is zero
Resultant force is zero
22
State Newton's second law of motion
Force equals mass times acceleration
F=ma
Resultant force is directly proportional to mass times acceleration
Resultant force is directly proportional to the rate of change of momentum
23
State Archimedes Principle
The mass of a floating object is less than the upthrust acting on it
Upthrust is equal to the weight of fluid displaced
Upthrust is equal to the volume of fuild displaced
The fluid displaced by an object is equal to the volume of the object
24
State what is meant by induced nuclear fission
Energy released from splitting of nuclei
Splitting of a nucleus as a result of a photon being absorbed
Splitting of a nucleus induced by gamma rays from other decays
Splitting of a nucleus as a neutron is absorbed
25
Define the term threshold frequency
minimum energy of EM radiation to remove electrons
minimum frequency of EM radiation to remove electrons
maximum frequency of EM radiation cause photoelectron emmision
minimum energy required to remove an electron from the surface of a metal
26
What is meant by the term polarised waves?
Transverse waves oscilating only upwards
Latitudinal waves all moving in the same direction
Longitudinal waves all moving in the same direction
Transverse waves oscilating in just one plane
27
State Hubble's law
Recession speed of a galaxy DP distance from Earth
Recession time of a galaxy DP distance from Earth
Recession force of a galaxy DP distance from Earth
Recession acceleration of a galaxy DP distance from Earth
28
Define the force constant of a spring
extension multiplied by force
extension plus force
force divided by the extenison
extension divided by force
29
State the Cosmological Principle
Universe is isotropic, homogenous, and the laws of physics are universal
Universe is isotopic, heterogenous, and the laws of physics are universal
Universe's laws change depending on what direction you go in
Universe is isotropic, heterogenous, and the laws of physics are universal
30
Define the term phase difference
The difference in energy of two waves
Difference in displacement of two points on a wave
The difference in frequency of two waves
Difference in angle between two points on a wave
31
In context of the photoelectric effect, define work function
The minimum amount of energy required to ionise an atom
The amount of energy required to remove an electron
The amount of energy a photoelectron has after being removed
The minimum amount of energy required to remove an electron
32
State Archimedes' principal
Upthrust = volume of fluid displaced
Upthrust = weight of fluid displaced
Upthrust = mass of fluid displaced
Upthrust = pressure of fluid displaced
33
Which condition on two forces is NOT part of Newton's second law.
Along the line between the centres of mass
The forces act on different objects
Same type
Equal magnitude and opposite direction
34
State the principle of superpostion
Two waves of the same phase difference undergo constructive interference
Non-superimposable mirror images are optical isomers
The resultant displacement is the sum of the individual displacements
The resultant displacement is the sum of the individual amplitudes
35
Why can sound waves not be polarised
Sound waves travel too slowly
Transverse waves cannot be polarised
Longitudinal waves cannot be polarised
Sound waves are apolitical
36
State Hubbles Law
A galaxy's velocity away from us is proportional to its mass
A galaxy's mass is proportional to its distance from us
A galaxy's velocity towards us is proportional to its mass
A galaxy's velocity away from us is proportional to its distance from us
37
State Faraday's law of electromagnetc induction
EMF induced in a wire DP rate of change of magnetic flux
EMF induced in a wire DP rate of change of magnetic fulx
EMF induced in a wire DP rate of change of magnetic flux linkage
EMF induced in a wire DP rate of change of magnetic flux density
38
What is the internal energy of a substance?
The kinetic energy of the atoms in a substance
The sum of kinetic and potential energies of the atoms
The temperature of the substance
Amount of energy required to separate a particle from a system of particles

13P2 - Definitions Quiz Flashcards | StudBud