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Quiz von Lakshmi Lakshmanan, aktualisiert more than 1 year ago
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Erstellt von Lakshmi Lakshmanan
vor mehr als 8 Jahre
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Frage 1
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What is energy?
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Measure of what an object can do
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Measure of the matter an object has
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Measure of the distance covered per unit time
Frage 2
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Energy is measured in [blank_start]Joules.[blank_end]
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Joules
Frage 3
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Which one of the option listed below are types of energy?
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Nuclear potential energy
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Acidic energy
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Kinetic energy
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Gas energy
Frage 4
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Energy can be destroyed.
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- True
- False
Frage 5
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Energy can be transformed from one type to another.
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- True
- False
Frage 6
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[blank_start]Heat[blank_end] is a way of transferring energy.
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Heat
Frage 7
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Work done is a measure of energy.
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- True
- False
Frage 8
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What unit does work done have?
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Joules
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Watts
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Volts
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Kilograms
Frage 9
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Work done calculates how much energy is needed to move an object with a [blank_start]force[blank_end] and a distance.
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force
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speed
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height
Frage 10
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What is the equation for work done?
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Work done = force*distance
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work done=energy /time
Frage 11
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The force is measured in [blank_start]newtons[blank_end] (N)
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newtons
Frage 12
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The distance is measured in centimetres.
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- True
- False
Frage 13
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Power calculates :
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the rate at which energy is delivered
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the speed of something
Frage 14
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P=E/t
Antworten
- True
- False
Frage 15
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The unit of power is [blank_start]watt[blank_end] (W) and the [blank_start]time[blank_end] is always in seconds (s).
Antworten
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watt
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Volt
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Joules
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time
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energy
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distilation
Frage 16
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Efficiency shows the percentage of energy that is converted into:
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useful energy
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wasted energy
Frage 17
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Efficiency = 100(Useful energy output/ total energy input)
Antworten
- True
- False
Frage 18
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The energy contained in foods is [blank_start]chemical[blank_end] energy.
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chemical
Frage 19
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What is a calorie?
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unit of energy used for how much energy is in food
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unit of speed for how fast a vehicle can travel
Frage 20
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1 Kcal =4841J
Antworten
- True
- False
Frage 21
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What is an energy resource?
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Where the energy comes from
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where the source of energy comes from
Frage 22
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What is a non-renewable energy resource?
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resource that will one day run out
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it will never run out
Frage 23
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Where does energy for tidal power come from?
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the sun
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the moon
Frage 24
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Nuclear power is when radio active material , usually uranium or thorium , is bombarded with neutrons.
Antworten
- True
- False
Frage 25
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What is the difference between biomass and biofuel?
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biomass is used to produce biofuel
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biomass is bigger than biofuel
Frage 26
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What is speed?
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it's the distance covered per unit tme
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it's the height covered per unit time
Frage 27
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s=d/t
Antworten
- True
- False
Frage 28
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What is the unit for speed?
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m/s
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mph
Frage 29
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What is the unit for distance?
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metres
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kilometres
Frage 30
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On a distance time graph, the steeper the line , the [blank_start]faster[blank_end] the object is moving.
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faster
Frage 31
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On a distance time graph, a [blank_start]straight[blank_end] line shows a constant speed.
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straight
Frage 32
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Velocity describes the [blank_start]speed[blank_end] at which something is travelling and the [blank_start]direction.[blank_end]
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speed
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direction
Frage 33
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Acceleration = velocity / time
Antworten
- True
- False
Frage 34
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What is a contact force?
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it acts directly on the object
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it acts at a distance from an object
Frage 35
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A [blank_start]free body[blank_end] diagram shows all the forces acting on a single object.
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free body
Frage 36
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What is weight?
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the force on an object due to mass and the amount of gravity.
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the amount of matter an object has
Frage 37
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What is the equation for weight?
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Weight =mass *gravity field strength
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W=mg
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W=v/t
Frage 38
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On the earth the gravity is [blank_start]9.8 N/kg.[blank_end]
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9.8 N/kg
Frage 39
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On the moon the gravity is [blank_start]1.6 N/kg.[blank_end]
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1.6 N/kg
Frage 40
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What are forces measured using?
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Newton meter
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ammeter
Frage 41
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The units for force are:
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newtons
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amps
Frage 42
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Newton's first law- Unbalanced forces cause an acceleration.
Antworten
- True
- False
Frage 43
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Newton's second law -An object's mass affects how much force is needed to accelerate it.
Antworten
- True
- False
Frage 44
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According to Newton's second law, what's the equation for acceleration?
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acceleration=force/mass
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acceleration=mass/force
Frage 45
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The unit for acceleration is m/s
Antworten
- True
- False
Frage 46
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The unit for mass is kg
Antworten
- True
- False
Frage 47
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What is newton's 3rd law?
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Forces acting on an object come in pairs
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Force is the same as gravity
Frage 48
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What is electricity?
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The movement of charged particles, generally electrons.
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movement of acceleration.
Frage 49
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[blank_start]Current[blank_end] is the rate of flow of charge.
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Current
Frage 50
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Voltage is the [blank_start]energy[blank_end] per charge.
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energy
Frage 51
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Resistance is a measure of how hard it is for [blank_start]current[blank_end] to flow.
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current
Frage 52
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A conductor allows energy to flow through it as it has many free electrons.
Antworten
- True
- False
Frage 53
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What does an ammeter do?
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Measures the current in a series circuit
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Measures the current in a parallel circuit
Frage 54
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The current in a series circuit is the same all around the circuit.
Antworten
- True
- False
Frage 55
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The longer the wire, the lower the resistance.
Antworten
- True
- False
Frage 56
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power = current * voltage
Antworten
- True
- False
Frage 57
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The diode allows current to flow in 1 direction.
Antworten
- True
- False
Frage 58
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A motor converts [blank_start]electrical energy[blank_end] into kinetic energy.
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electrical energy
Frage 59
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The thermistor changes resistance with water.
Antworten
- True
- False
Frage 60
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The buzzer converts electrical energy into [blank_start]sound[blank_end] energy.
Antworten
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sound
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