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Transcript of Final Exam Review Physical Science 1) What 2 factors are involved in calculating speed? a)Distance...
Final Exam Review
Physical Science
1) What 2 factors are involved in
calculating speed?
a)Distance and speedb)Distance and timec)Velocity and timed)Velocity and speed
Distance and time
2) What is the equation for acceleration?
a) time interval/ change of velocityb) change of velocity/ time intervalc) distance/time
d)Time/distance
change of velocity/ time interval
3) A bike goes from rest to 30 km/h in 20 seconds what is the
acceleration?
a) 1.25b) 50c) 10d) 1.51.5
4) In 3 seconds a car increases its speed
from 40km/h to 45km/h while a
bicycle goes from rest to 5km/h which
has a greater acceleration?
a) carb) bikec) samed) I don’t
know
same
5) The rate at which velocity changes with
time where the change in velocity may be in
magnitude or direction or both. This is the definition
of:
a) speedb) velocityc) free falld) accelerationacceleration
6) The formula for distance
traveled in free fall is d =
a) 1/2gt(2)b) 1/2gt2
c) 1/2g2td) 1/2tg(2)
1/2gt2
7) The amount of matter in an
object is
a) weightb) massc) volumed) area
mass
8)The amount of space taken up by an object is
a) weightb) massc) volumed) surface area
volume
9) “Every material object continues in its state of rest,
or in uniform motion in a straight line, unless acted upon by an unbalanced force.” What is this law?
a) Newton’s first lawb) Newton’s 2nd lawc) Newton’s 3rd lawd) Momentum law
Newton’s first law
10) The acceleration of an object is directly
proportional to thea) massb) forcec) speedd) velocity
force
11) What is force?
a) potential energyb) a push or a pullc) workd) kinetic energy
A push or a pull
12) Acceleration is inversely
proportional to:
a) forceb) massc) workd) pressure
mass
13) When the acceleration of an object is zero, we
say that the object doing what?
a)Free fallingb) changing directionc) speeding upd) constant motion or staying stillConstant motion or staying still
14) For every action there is an equal
and opposite:a) energy flowb) accelerationc) reactiond) Newton's 3rd law
reaction
15) What is the correct formula
for momentum?
a) mass/volumeb) mass x volumec) mass x velocityd) velocity/mass
Mass x velocity
16) What is the power if the
voltage is 110 V and the current 4
Amps?a) 27.5 Wb) 27.5 Ohmsc) 440 Ohmsd) 440 W440 W
17) V = IR
a) Ohm’s Law b) Coulomb’s Lawc) Voltage Lawd) Electric Power
Ohm’s Law
18) The ability to do work is:
a) energyb) potential energyc) accelerationd) motion
energy
19) What law is this? Energy cannot be created or destroyed; it may be
transformed from one for into another, but the total
amount of energy never changes.,
a) conservation of massb) conservation of matterc) conservation of
momentumd) Conservation of energyConservation of energy
20) If an object has energy it:
a) has the ability to do workb) must have kinetic energyc) is doing workd) Has force
Has the ability to do work
21) What is the potential energy of 1 kg. block on a ledge
10 meters high
a) 980 kg*mb) 98 kg*mc) .98 kg*md) 9.8 kg*m
98 kg*m
22) What is the formula for work?
a) force x circumferenceb) force/ areac) Force x distanced) Distance and weight
Force x distance
23)Which of the following are most important in
determining the amount of gravity between two
objects?
a) time and weightb) Mass and distancec) Force and massd) distance and weight
Mass and distance
24)What law is this: F = kq1q2
d2?
a) Ohm’s Lawb) Law of Gravityc) Coulomb’s Lawd) Law of Conservation of
energy
Coulomb’s Law
25)Which circuit would
allow other lights to stay lit if one
went out?
a) short circuitb) Parallel circuitc) Series circuitd) Open circuit
Parallel circuit
26) What is density?
a) how heavy an object isb) force/areac) mass/volumed) weight/volume
Mass/volume
27) Which is not a way to generate static charge?
a) inductionb) touchingc) conductiond) friction
touching
28) What is the momentum of a
1200kg. car traveling at 8 m/s?
a) 150 kg*m/sb) 9600 kg*m/sc) 1208 kg*m/sd) Cannot be determined with
information given
9600 kg*m/s
29) Calculate the speed of a car that went 144 miles in 1 hour 30 minutes
a) 96 mphb) 216 mphc) 72 mphd) 115 mph
96 mph
30) How much power is used if a student
weighing 520 N. climbs the stairs
(vertical height) of 3.6 meters in 5 s.
a) 104.72 Wb) 374.4 Wc) 28.9 Wd) 9360 W
374.4 W
31) In order to increase power,the
student in the previous problem
could:a) Lose weightb) Gain weight yet keep the same
speedc) Climb the stairs slowerd) Climb the stairs fastere) Both b and dBoth b and d
32) What is the force required to
accelerate a 32 kg. box at a rate of 3
m/s2?
a) 35 Nb) 96 Nc) 10.67 Nd) There are several forces
96 N
33) Distilled water has a density of _________ g/cm3
a) 0b) 9.8c) 2d) 11
34) Heat is best described as:
a) The transfer of thermal energy
b) How hot something may bec) Thermal energyd) Temperature
The transfer of thermal energy
35) Newton’s second law states
a) F= mab) P1V1 = P2V2c) D = m/vd) P = force/area
F= ma
36) In the electromagnetic
spectrum, the waves with the highest
energy are:
a) microwavesb) X raysc) Gamma raysd) Radio waves
Gamma rays
37) A measure of the average
kinetic energy of the molecules is:a)temperatureb) heatc) Thermal energyd) friction
temperature
38) As water freezes, the
density decreases because
the________ increases
a) pressureb) volumec) iced) Thermal energy
volume
39) How much kinetic energy
does a 24 kg. cart traveling 3m/s
have?a) 108 Jb) 72 Jc) 8 Jd) None of these answers
108 J
40) An object that is in free fall
but not accelerating any
more must be ___________
a) on the groundb) experiencingc) At terminal velocityd) deceased
At terminal velocity
41) The temperature of boiling water in
Celsius is ___ degrees.
a) 212b) 100c) 32d) 0
100
42) After 4 seconds of free fall, an object
should be traveling at ___ m/s
a) 10b) 15c) 25d) 4040
43) The weight of a 2 kg. Box of
chocolates would be____ N.
a) 2b) 20c) .2d) 12
20
44) What is the net force if an object is pushed west with a
force of 5 N and east with a force of 25 N.
a) 20 N eastb) 20 N westc) 30 N eastd) 30 N west
20 N east
45) A force vector shows
both ________ and direction.
a) pressureb) Magnitude (amount)c) energyd) power
Magnitude (amount)
46) A car and a truck collide head-on. The car has a mass half that of the truck. The impact
force of the truck on the car is 500 N. what is the
impact force of the car on the truck
a) 250 Nb) 500 Nc) 750 Nd) Not sure
500 N
47) An object following a
straight-line path at constant
speeda) has zero accelerationb) Must be moving in a vacuum or
in the absence of air friction.c) Has no forces acting on itd) Has a net force acting in the
direction of motion
has zero acceleration
48) A 20kg. Cart moving 5m/s collides with a stationary cart with a mass of 5kg. They stick together after the crash. How fast are they going?
a)2b) 4c) 5d) 1
4
49) How much work is done when a 12 kg object is lifted 2 meters?
a) 24 N*m b) 120 N*mc) 240 N*md) Cannot be determined
240 N*m
50) The method of heat transferring which fluids move thermal energy in
currents is:
a) conductionb) radiationc) Lava flowsd) ConvectionConvection