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Nat 4/5 Christmas and course so far Flashcards | StudBud
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Nat 4/5 Christmas and course so far
What does u stand for in the acceleration equation?
Which of these is true?
Nat 4/5 Christmas and course so far
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Physics Newtons Laws
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
Which of these is true?
AC is when electrons move in one direction
AC circuits could be powered by a cell
DC circuits could be powered by a battery
DC is when electrons periodically change direction
2
What does u stand for in the acceleration equation?
rest speed
final speed
initial speed
average speed
3
Why do astronauts onboard the ISS feel weightless?
Because they and the ISS are falling at the same rate
Because gravity is very weak on the ISS
Because they are in space
Because gravity is zero on the ISS
4
Which of these is an object which orbits a star in another galaxy?
nebula
planet
moon
exoplanet
5
Which of these is not true about the specific latent heat of vapourisation?
it causes a change in temperature of the material
it's the energy needed to change the state of only 1kg
it is associated with the transition between a liquid + gas
it is measured in Jkg-1
6
What is the period of a geostationary satellite?
1 month
1 day
1 year
1 hour
7
Which of these are true for a fixed mass of gas?
Volume is inversely proportional to temperature in K
Pressure and volume are directly proportional
Temperatures in K are directly proportional to volume
Pressure is directly proportional to temperature in °C
8
Which of these is not true about electric fields?
it would attract an electron towards a positive object
field lines point from negative to positive
it is a place where a charged particles experiences a force
the closer the lines the stronger the field
9
Which of these is a technology used to overcome a challenge of space travel?
Artificial limbs
Ion Drives
Sling shots
Cryogenic Freezing
10
If a car is moving at a constant speed, what can we say about the forces acting on the object?
they are balanced
there is only one force pushing it forward
they are unbalanced
all the forces act in the same direction
11
1 volt is the same as
1 joule per coulomb
1 joule per second
1 watt per joule
1 watt per coulomb
12
What piece of equipment is needed to measure instantaneous speed?
reaction timer
light gate
stopwatch
trundle wheel
13
Which of these equations could be used to work out the average speed of an object?
v=t/d
v=dt
d=vt
t=v/d
14
What is the kinetic energy of a 1kg toy which is pushed at a speed of 5m/s?
2.5J
5J
25J
12.5J
15
Which is not a risk to astronauts during their time on the ISS?
Spacesuit malfunction
Pressure Differentials
They will age faster
Potential exposure to radiation
16
Which of these is not a vector quantity?
speed
velocity
weight
displacement
17
What is the unit for acceleration?
ms-1
ms2
ms1
ms-2
18
Which is in the correct order from smallest to largest
Moon, Star, Universe
Planet, moon, star
Universe, galaxy, planet
Galaxy, star, Universe
19
When something falls what is the most common type of wasted energy?
kinetic energy
heat energy
sound energy
potential energy
20
What is current BEST described as?
The number of electrons that flow in a circuit
The amount of charge that flows in a circuit
The charge that flows per second
The number of electrons per second
21
What does the F stand for in Newton's Second law?
balanced force
force
friction
unbalanced force
22
Newton's 3rd law: If the balloon pushes the air backwards....
the balloon pushes itself forwards
the balloon pushes the air forwards
the air pushes the pushes backwards
the air pushes the balloon forwards
23
What is the size of the resultant force on this object?
2N
7N
5N
3N
24
Which of these is not true about our universe?
It is infinite (in space)
It's approx 14 million years old
It is expanding
It contains billions of galaxies
25
Which of these is not true?
The higher something is the more potential energy it has
Mass has more of an effect on kinetic energy than speed does
The higher gravitation field strength the higher the Ep
Energy is ALWAYS conserved
26
Which of these does not use satellites?
Weather Forecasting
Hubble telescope
GPS
Speed Cameras
27
Calculate the distance travelled by this object.
40m
32m
80m
64m
28
What are the units of specific heat capacity?
Jkg°C-1
Jkg°C
Jkg-1
Jkg-1°C-1
29
Which of these is not evidence for the big bang?
Light from far away stars is red shifted
There is an abundance of hydrogen and helium in our universe
The sky is light during the day
Cosmic Microwave Background Radiation
30
Calculate the acceleration of this object.
4ms-2
3ms-2
5ms-2
2ms-2
