PHYSICS 1 Stetson University Physics Measuring Tools Quiz quiz about physics 1quiz physics quiz physics quiz physicsquiz physics quiz physics quiz physicsq

PHYSICS 1 Stetson University Physics Measuring Tools Quiz quiz about physics 1quiz physics quiz physics quiz physicsquiz physics quiz physics quiz physicsquiz physics quiz physics quiz physicsquiz physics quiz physics quiz physicsquiz physics quiz physics quiz physics Quiz 1A
Started: Jun 14 at 9:46pm
Quiz Instructions
This is largely a repeat of Quiz 1. Sometimes, testing can be used to promote learning rather
than serve to assess prior learning. This quiz will give students a chance to improve their Quiz
score before Quiz 2 runs. This quiz is open over a weekend but a 75 minute countdown clock
will run once the student starts taking the quiz.
Question 1
5 pts
Match the phrases (definitions) on the left with their corresponding term on
the right.
In many experiments, a physical quantity is measured repeatedly to obtain
a better value of that quantity compared to a single measurement.
Suppose those repeated measurements are sorted according to their value
and the number of measurements in different ranges are calculated. Those
numbers can be viewed as a frequency: how many times the
measurements fell in a specified range. A bar-chart of all of these
frequencies as a function of measured value is called a histogram. See
below.
The center of a histogram of
many repeated measurements..
[ Choose ]

The width of a histogram of many
repeated measurements.
[ Choose ]

The range over which a
measurement might vary.
[ Choose ]

[ Choose ]

[ Choose ]

The error in a measured value
divided by that value and then
mulitplied by 100.
How far apart two numbers are
expressed as a percent of one of
the numbers.
Question 2
5 pts
In this lab course, errors are unavoidable and can arise from the measuring
tools used.
True
False
Question 3
5 pts
Precision is how close a measured value is to its theoretically correct value.
True
False
Question 4
5 pts
An object has a constant acceleration. Consider a graph of its position
versus time. The slope of a straight line drawn between two different points
on the graph’s curve is the object’s
average velocity
instantaneous jerk
instantaneous velocity
average acceleration
acceleration
Question 5
5 pts
Three strings are tied to a small object and are pulled in three different
directions in the x-y plane. The small object is found to be in static
equilibrium. The three pulls (tensions) are measured both in magnitude and
direction. This information is then presented in a force vector diagram as
shown. Assume the x and y axes are marked in Newtons.
Calculate the magnitude of the error vector as a percentage of the average
magnitude of the three forces. Enter it in the second answer field. Express
your answer as a percent in the format ##.# but do not include a % symbol.
Question 6
5 pts
Calculate the average and sample standard deviation of the following
numbers. You can use Excel for this question and assume 15 is a small
population size. Then calculate the percent error. Enter the percent error
as a number in the format #.# with no % symbol.
1
2
3
20.20
18.10
19.00
4
5
6
7
8
9
10
16.40
18.20
19.30
16.30
19.40
17.00
19.40
11
12
13
14
15
18.80
17.90
17.40
20.60
19.60
A spring scale is an instrument used to measure force by virtue of the
expansion of a calibrated spring. The spring scale shown below can
measure up to 10 N and it has a precision of ± 0.2 N.
Question 7
5 pts
There are four small tic-marks between each integer number of Newtons.
The indicator edge inside the plastic cylinder may rub slightly against the
cylinder wall so that two different trials measuring the same force might be
off by plus or minus one tick-mark. This is an example of which type of
experimental error?
intrinsic random error
intrinsic systematic error
systematic error in measurement
random error in measurement
Question 8
5 pts
Suppose when the jaws of a Vernier Caliper are closed, the first mark on
the Vernier scale does NOT line up with the 0.000 cm mark above it.
Instead the scale reading is 0.004 cm. This number is an example of which
type of experimental error?
intrinsic systematic error
intrinsic random error
systematic error in measurement
random error in measurement
Quiz saved at 9:47pm
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