Transcript If the displacement of an object, x, is related to velocity, v, according

If the displacement of an object, x, is related to velocity,
v, according to the relation x = Av, the constant, A, has
the dimension of which of the following?
a. acceleration
b. length
c. time
d. area
If the displacement of an object, x, is related to velocity,
v, according to the relation x = Av, the constant, A, has
the dimension of which of the following?
→
a. acceleration
b. length
c. time
d. area
A crate has the dimensions of 1.0 m x 1.2 m x
0.80 m. If there are 3.28 feet per meter then
what is the volume of the crate in cubic feet?
a. 34 cubic feet
b. 10 cubic feet
c. 68 cubic feet
d. 3 cubic feet
A crate has the dimensions of 1.0 m x 1.2 m x 0.80
m. If there are 3.28 feet per meter then what is the
volume of the crate in cubic feet?
→a. 34 cubic feet
b. 10 cubic feet
c. 68 cubic feet
d. 3 cubic feet
1.0 m x 1.2 m x 0.80 m=0.96 m3
0.96 m3 x (3.28 ft/meter)3= 34 ft3
If a jet airplane climbs at an angle of 15 with respect to
the horizontal and follows a straight-line path for a
distance of 400 m, how much altitude does it gain?
a. 100 m
b. 390 m
c. 141 m
d. 200 m
If a jet airplane climbs at an angle of 15 with respect to
the horizontal and follows a straight-line path for a
distance of 400 m, how much altitude does it gain?
→ a. 100 m
b. 390 m
c. 141 m
d. 200 m
400 m
15o
sin 15o = y/400m
y=(sin 15o)400 m=100 m
y
Mass, along with what other two quantities, make up the
three basic quantities in mechanics used by physicists
to derive additional quantities?
a. length and force
b. power and force
c. length and time
d. force and time
Mass, along with what other two quantities, make up the
three basic quantities in mechanics used by physicists
to derive additional quantities?
→
a. length and force
b. power and force
c. length and time
d. force and time
Mass, length, and time are the three basic quantities of measurement
in the study of mechanics.
Note the following mathematical expression: y =
x 2 . Which one of the statements below is most
consistent with this expression?
a. if y doubles, then x quadruples
b. y is greater than x
c. if x doubles, then y doubles
d. if x doubles, then y quadruples
Note the following mathematical expression: y =
x 2 . Which one of the statements below is most
consistent with this expression?
→
a. if y doubles, then x quadruples
b. y is greater than x
c. if x doubles, then y doubles
d. if x doubles, then y quadruples
Consider, if x=2, then y=4. If you increase x by a factor of 2 so x=4, then y=16.
Which of the following formulas is dimensionally
consistent with an expression which would yield a value
for time -1 (v is velocity, x is distance, and t is time)?
a. v/x
b. v2/x
c. x/t
d. V2 t
Which of the following formulas is dimensionally
consistent with an expression which would yield a value
for time -1 (v is velocity, x is distance, and t is time)?
→ a. v/x
b. v2/x
c. x/t
d. V2 t
Since 1967 the standard definition for the
second of time has been based on which
of the following?
a. characteristic frequency of
the cesium-133 atom
b. average solar day
c. sidereal day
d. Greenwich Civil Time
Since 1967 the standard definition for the
second of time has been based on which
of the following?
→
a. characteristic frequency of
the cesium-133 atom
b. average solar day
c. sidereal day
d. Greenwich Civil Time
Since 1983 the standard meter has been
defined in terms of which of the following?
a. specific alloy bar housed at
Sevres, France
b. wavelength of light emitted by
krypton-86
c. distance from the Earth's equator
to the north pole
d. the distance light travels in 1/(3 x
108) second
Since 1983 the standard meter has been
defined in terms of which of the following?
→
a. specific alloy bar housed at
Sevres, France
b. wavelength of light emitted by
krypton-86
c. distance from the Earth's equator
to the north pole
d. the distance light travels in 1/(3 x
108) second
Which of the following formulas is dimensionally
consistent with an expression yielding a value for
acceleration (v is velocity, x is distance, and t is time)?
a. v/t2
b. v/x2
c. v2/t
d. v2/x
Which of the following formulas is dimensionally
consistent with an expression yielding a value for
acceleration (v is velocity, x is distance, and t is time)?
→
a. v/t2
b. v/x2
c. v2/t
d. v2/x
Which point is nearest the y-axis?
a. (3,4)
b. (4,3)
c. (-5,2)
d. (-2,-5)
Which point is nearest the y-axis?
→
a. (3,4)
b. (4,3)
c. (-5,2)
d. (-2,-5)
Which one of the choices below represents the
preferred practice regarding significant figures when
multiplying the following: 10.5 x 8.8 x 3.14?
a. 290
b. 290.136
c. 290.1
d. 300
Which one of the choices below represents the
preferred practice regarding significant figures when
multiplying the following: 10.5 x 8.8 x 3.14?
→ a. 290
b. 290.136
c. 290.1
d. 300
When multiplying or dividing numbers, keep the lowest number of
significant figures.
The speed of a boat is often given in knots. If a
speed of 5 knots were expressed in the SI
system of units, the units would be
a. m
b. s
c. m/s
d. kg/s
The speed of a boat is often given in knots. If a
speed of 5 knots were expressed in the SI
system of units, the units would be
→
a. m
b. s
c. m/s
d. kg/s
If a is acceleration, v is velocity, x is
position, and t is time, then which
equation is not dimensionally correct?
a. t = x/v
b. a = v2 /x
c. v = a/t
d. t2 = 2x/a
If a is acceleration, v is velocity, x is
position, and t is time, then which
equation is not dimensionally correct?
a. t = x/v
b. a = v2 /x
→c. v = a/t
d. t2 = 2x/a
Which one of the choices below represents the
preferred practice regarding significant figures
when adding the following: 21.4 + 15 + 17.17 +
4.003?
a. 57.573
b. 57.57
c. 57.6
d. 58
Which one of the choices below represents the
preferred practice regarding significant figures
when adding the following: 21.4 + 15 + 17.17 +
4.003?
→
a. 57.573
b. 57.57
c. 57.6
d. 58
When adding or subtracting numbers, keep the lowest number of
decimal places.