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Inquiry into Physics 8th Edition by Ostdiek, Verified Chapters 1 - 12, Complete Newest Version
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TEST BANK For Inquiry into Physics 8th Edition by Ostdiek,Verified Chapters 1 - 12, Complete Newest Version
A room in a house has a floor area of 120 ft2. Which of the following is most likely
the approximate volume of the room?
a. 3 m3
b. 30 m3
c. 300 m3
d. 3 000 m3 - ANSWER:B(chpt1)
When SI units are plugged into an equation, it is found that the units balance. Which
of the following can we expect to be true for this equation?
a. The equation will be dimensionally correct.
b. The equation will be dimensionally correct except sometimes in cases when the
right
hand side of the equation has more than one term.
c. The equation will not be dimensionally correct.
d. All constants of proportionality will be correct. - ANSWER:A(chpt2)
How long has it been that scientists have accepted that the nucleus of the atom
consists of neutrons and protons? Think of your answers in terms of order of
magnitude.
a. about a decade
b. about a century
c. about a thousand years
d. since Aristotle - ANSWER:B(chpt1)
Consider the sine of any angle between 30° and 40°. If the angle were doubled, what
would happen to the sine of the angle?
a. It would double.
b. It would more than double.
c. It would increase but be less than double.
d. In different cases, it could do any of the above. - ANSWER:C(chpt1)
There are other ways of expressing uncertainty besides significant figures. For
example, suppose a quantity is known to have a value between 20.4 and 20.0 and
our best estimate of the value is midrange at 20.2. We could write the number as
20.2 +/- 0.2 and say that the number has a 1% uncertainty. We would also say it has
3 significant figures. If we square a number with 1% uncertainty (i.e., 2 parts in about
200) and 3 significant figures, what results?
a. A number with 1% uncertainty and 3 significant figures.
b. A number with 2% uncertainty and 3 significant figures.
c. A number with 2% uncertainty and 2 significant figures.
d. A number with 1% uncertainty and 2 significant figures. - ANSWER:B(1)
,In mechanics, physicists use three basic quantities to derive additional quantities.
Mass is one of the three quantities. What are the other two?
a. length and force
b. power and force
c. length and time
d. force and time - ANSWER:C(1)
The prefixes which are abbreviated p, n, and G represent which of the following?
a. 10-2, 10-6, and 1015
b. 10-9, 106, and 1010
c. 10-12, 10-9, and 109
d. 10-15, 10-6, and 1012 - ANSWER:C(1)
The ratio M/m of the prefixes M and m has what value?
a. 10^3
b. 10^6
c. 10^9
d. 10^18 - ANSWER:C(1)
Which formula is dimensionally consistent with an expression yielding a value for
velocity? (a is acceleration, x is distance, and t is time)
a. v/t2
b. vx2
c. v2/t
d. at - ANSWER:D(1)
Which expression is dimensionally consistent with an expression that 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. v2t - ANSWER:A(1)
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 - ANSWER:C(1)
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. - ANSWER:C(1)
,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. t^2 = 2x/a - ANSWER:C(1)
Suppose an equation relating position, x, to time, t, is given by x = b t3 + c t4, where
b and c are constants. The dimensions of b and c are respectively:
a. T3, T4.
b. 1/T3, 1/T4.
c. L/T3, L/T4.
d. L2⋅T3, L2⋅T4. - ANSWER:C(1)
Areas always have dimensions ____ while volumes always have dimensions ____.
a. m2, m3
b. L2, L3
c. Both a and
b are correct.
d. No answer is correct because of the "always". - ANSWER:B(1)
36. Which point is nearest the x-axis?
a. (−3, 4)
b. (4, 5)
c. (−5, 3)
d. (5, −2) - ANSWER:D(1)
Note the expression: y = x2. Which statement 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 - ANSWER:D(1)
Note the expression: y = A/x3. Which statement is most consistent with this
expression?
a. y is less than A
b. if x is halved, y is multiplied by eight
c. if x is doubled, y is multiplied by a factor of 8
d. y is greater than x - ANSWER:B(1)
A ball of relatively low density is thrown upwards. Because of air resistance the
acceleration while traveling upwards is -10.8 m/s2. On its trip downward the
resistance is in the opposite direction and the resulting acceleration is -8.8 m/s2.
When the ball reaches the level from which it was thrown, how does its speed
compare to that with which it was thrown?
, a. It is greater than the original speed upward.
b. It is the same as the original speed upward.
c. It is less than the original speed upward.
d. Without knowing the original speed, this problem cannot be solved. -
ANSWER:C(2)
Starting from rest, a car accelerates down a straight road with constant acceleration
a1 for a time t1, then the acceleration is changed to a different constant value a2 for
an additional time t2. The total elapsed time is t1 + t2. Can the equations of
kinematics be used to find the total distance traveled?
a. No, because this is not a case of constant acceleration.
b. Yes, use (a1 + a2)/2 as the average acceleration and the total time in the
calculation.
c. Yes, use a1 + a2 as the acceleration and the average time (t1 + t2)/2 in the
calculation.
d. Yes, break the problem up into 2 problems, one with the conditions for the first
time interval and the other with the conditions for the second time interval, noting
that
for the second time interval the initial velocity is that from the end of the first time
interval. When done, add the distances from each of the time intervals. -
ANSWER:D(2)
Starting from rest, a car accelerates down a straight road with constant acceleration
a for a time t, then the direction of the acceleration is reversed, i.e., it is -a, and the
car comes to a stop in an additional time t, the time for the whole trip being 2t. At
what time, or times, is the average velocity of the car for the trip equal to its
instantaneous velocity during the trip?
a. There is no such time.
b. It is at the halfway point at t.
c. This occurs at 2 times, 0.5 t and 1.5 t.
d. This occurs at 2 times, 0.707 t and 1.293 t. - ANSWER:C2
A ball rolls down an incline, starting from rest. If the total time it takes to reach the
end of the incline is T, how much time has elapsed when it is halfway down the
incline?
a. 0.5 T
b. < 0.5 T
c. > 0.5 T
d. More information is needed. - ANSWER:C2
In which of the following cases is the displacement's magnitude half the distance
traveled?
a. 10 steps east followed by 3 steps west
b. 22 steps east followed by 11 steps west
c. 5 steps east followed by 10 steps west
d. 15 steps east followed by 5 steps west - ANSWER:D2
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