1735949
Descrição
Quiz por Nicole Saville, atualizado more than 1 year ago
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Criado por Nicole Saville
quase 10 anos atrás
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Questão 1
Questão
What is internal energy?
Responda
-
when an object has speed
-
the movement of particles
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the random movement of molecules and the attractive forces between them when they're together
Questão 2
Questão
What is chemical energy
Responda
-
energy can be released when the arrangement of atoms is altered
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energy can be released by reorganising the protons and neutrons in an atoms nucleus
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where an object is at a high level in the earth's gravitational field
Questão 3
Questão
What is energy?
Responda
-
the ability to do work
-
the work done by a force
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work done per unit time
Questão 4
Questão
Which of these are examples of potential energy?
Responda
-
chemical
-
electrical potential
-
electromagnetic
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gravitational potential
-
nuclear
-
internal
-
sound
-
kinetic
Questão 5
Questão
What is a kinetic type of energy?
Responda
-
where movement is taking place
-
regions where electric, magnetic, gravitational or nuclear forces exist
Questão 6
Questão
The conservation of energy is: In a closed system, energy may be converted form one form into another but never created or destroyed
Responda
- True
- False
Questão 7
Questão
What is the equation for kinetic energy?
Responda
-
1/2mv^2
-
mgh
-
mgv
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1/2mv
Questão 8
Questão
What is energy measured in?
Responda
-
Joules
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Newtons/metre
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Joule metre/second
Questão 9
Questão
What is work done?
Responda
-
focre / distance
-
force x distance moved in the direction of force
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force x energy
-
energy x distance
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force / time
Questão 10
Questão
Work done is the energy transferred when a force is mode through a distance
Responda
- True
- False
Questão 11
Questão
What is power and what is it measured in?
Responda
-
work done/ time taken
-
watts
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joules
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work done x time
Questão 12
Questão
One watt is the power generated when one joule of energy is transferred to an object.
Responda
- True
- False
Questão 13
Questão
What is weight?
Responda
-
The gravitational force on an object
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mass x gravity
-
the mass of an object
Questão 14
Questão
What is terminal velocity?
Responda
-
the velocity at which an objects drag equals its acceleration force
-
for free fall - when weight = drag
-
the fastest possible velocity
-
when you're accelerating
Questão 15
Questão
At terminal velocity:
Responda
-
kinetic energy is constant
-
the GPE is transferred to the surrounding air as heat
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The loss in KE is the work done by the drag force
Questão 16
Questão
The larger the surface area of an object, the smaller the terminal velocity because there is more drag so you don't accelerate as much before drag = weight.
Responda
- True
- False
Questão 17
Questão
The larger the mass, the smaller the terminal velocity
Responda
- True
- False
Questão 18
Questão
What is stopping distance?
Responda
-
The time taken for a car to stop
-
The total instance a car travels from the moment the driver sees a hazard
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The time taken from the moment the driver has pressed the break
Questão 19
Questão
Factors that increase thinking distance:
Responda
-
under the influence of alcohol or other drugs
-
tiredness
-
distractions
-
high speed
-
weather
-
intelligence
Questão 20
Questão
The work done to stop an object will be equal to the change in kinetic energy of the object
Responda
- True
- False
Questão 21
Questão
Factors that increase breaking distance
Responda
-
high speed
-
mass of vehicle
-
road conditions
-
car conditions
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driver distractions
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alcohol/drugs
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tiredness
Questão 22
Questão
If speed of a car doubles:
Responda
-
kinetic energy quadruples
-
work done quadruples
-
breaking distance quadruples
Questão 23
Questão
An air bag works by:
deflated nylon bag attached to a crash sensor which measures acceleration and detects when you are breaking very sharply. It releases two chemicals which react rapidly and produce nitrogen gas which inflates the airbag.
Responda
- True
- False
Questão 24
Questão
What is trilateration?
Responda
-
using four satellites together to determine the position of something
-
The distance from a satellite to the earth
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The orbit of a satellite
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