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Physical Science 2nd semester exam review Flashcards | StudBud
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Physical Science 2nd semester exam review
Physical Science 2nd semester exam review
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Hillsborough county review
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1
What is the force that opposes motion?
mass
balanced
unbalanced
friction
2
What is the effect described when pitch changes due to the movement of the sound?
Ohm
Dalmation
Pitch
Doppler
3
What is a material that blocks the flow of electricity?
conductor
insulator
semi-conductor
diode
4
If
d= v x t
, determine the distance a man moves in 20 s, if he is moving at a speed of 2 m/s?
400 m/s
0.1 s
10 m
40 m
5
In physics what is work?
When an object doesn't move
When a force moves an object
When a person goes to his job
6
Which of Newton's laws states that an object at rest remains at rest unless a force changes it?
3rd law
Law of Gravity
2nd law
1st law
7
Which of Newton's Laws states as a force increases, so does its acceleration.
1st Law
3rd Law
Law of Gravity
2nd Law
8
What happens when the net forces are zero and there is no change in the objects motion?
forces are unbalanced
forces are balanced
9
What is the ability to do work?
isolated event
power
open event
energy
10
What is a solid state component that combines a n-types and p-type semiconductor?
conductor
transistor
diode
insulator
11
How is speed determined?
displacement
distance/ time
distance
mass x acceleration
12
What is the scientific name for a light wave?
electromagnetic wave
transverse wave
surface wave
longitudinal wave
13
What is the tendency of an object to resist a change in its motion?
sublimation
voltage
resistance
inertia
14
What is the fastest speed with which anything can move?
supersonic speed
the speed of sound
warp speed
the speed of light
15
What type of wave travels in the direction of the vibration?
longitudinal
electromagnetic
transverse
surface
16
What is energy that is stored due to its shape or position?
mechanical energy
potential energy
kinetic energy
17
What has both magnitude and direction?
scalar
vector
18
What is the distance between a crest and the rest position?
amplitude
trough
waveheight
wavelength
19
When an object fall toward the earth due to gravity, it is said to be in...
suspended animation
free fall
weightlessness
danger
20
When an ambulance approaches you, what happens to the pitch?
It doesn't change
It barks
It goes flat, goes down
It goes sharp, goes up
21
Which Law says: moving objects continue in the same speed and dir. unless a force changes it?
Newton's 2nd law
Newton's 1st Law
Newton's 3rd Law
Law of Gravity
22
If you travel to the moon, which of the following will change?
your weight
your mass
your height
your personality
23
What happens to the mass of an object on the moon?
It decreases
It increases
It remains the same
24
What can your initial position also be called?
origin
final position
destination
resting place
25
What are most systems in the real world?
open
closed
random
isolated
26
Which of Newton's laws state: for every action there is an equal and opposite reaction?
2nd Law
3rd Law
1st Law
Law of Gravity
27
What is the continuous flow of electrical charges?
current
voltage
resistance
amplitude
28
What is the peak of a transverse wave?
amplitude
crest
wavelength
trough
29
What make speed and velocity different?
velocity includes a direction
velocity is a change in a speed or direction
speed is a time
speed includes a origin
30
What is the force of acceleration due to gravity on the earth?
78 %
9.8 m/s2
21 m/g
57 m/s
31
What is a push or pull motion that acts on an object?
momentum
force
inertia
matter
32
What is a measure of the inertia of an object?
matter
weight
resistance
mass
33
What is a wave that has peaks and valleys and travels through a medium called?
transverse
longitudinal
electromagnetic
surface
34
What is a disturbance in matter that carries energy from one place to another?
electromagnetic wave
mechanical wave
35
What is the rate of doing work?
force
work
energy
power
36
What is the device in opposition to the flow of electricity?
transistor
diode
conductor
resistor
37
What is a straight line and the shortest distance from the initial to final position?
destination
distance
displacement
detour
38
What happens when an object moves or accelerates?
forces are balanced
forces are unbalanced
39
What is the number of complete cycles in a given period of time?
period
frequency
wavelength
amplitude
40
What is energy that is in motion?
kinetic energy
elastic potential energy
open energy
potential energy
41
A car starts from rest and accelerates to a velocity of 25 m/s west. What is its initial speed?
15 m
0 m/s
10 s
25 m/s
42
What is a material that allows electricity to flow?
Diode
semi-conductor
conductor
insulator
43
What happens to the weight of an object on the moon?
It decreases
It increases
It remains the same
44
What is a solid state component with 3 layers of semiconductors?
insulator
diode
transistor
conductor
45
List the four fundamental forces in order from strongest to weakest.
gravity, electromagnetic, weak, strong
strong, electromagnetic, weak, gravity
weak, strong, electromagnetic, gravity
strong, weak, electromagnetic, gravity
46
What sort of wave does not travel through a medium, but has peaks and valleys?
transverse
surface
electromagnetic
longitudinal
47
What is the time required for one cycle of a wave?
wavelength
amplitude
frequency
period