ch. 1 physics quiz

To minimize a random error of the measurement one should repeat the measurement several times. a. True b. False

a, true

Propagated error is the result of a. using measured values with given uncertainty to calculate other quantities b. moving an instrument used for the measurement from one place to another c. having different people measure the same quantity

a. using measured values with given uncertainty to calculate other quantities

If experimental findings are not reproducible, a. the results are not considered valid b. the results are considered valid, but not usable c. it is an indication of scientific fraud d. it is an indication that scientific method was not followed

a, the results are not considered valid.

Most natural phenomena we wonder about involve several scientific disciplines. a. True b. False

a, true

in science, a theory is unchangeable a. true b. false

b, false

The scientific method is a method for: a. making hypotheses b. gaining new knowledge c. making observations d. testing theories e. designing experiments

b, gaining new knowledge

In science, facts a. are absolute b. may change c. mean very little d. are more important than theories

b, may change

The reaction time measurement in the lab was an example of what type of an error? a. systematic b. random c. propagated d. human mistake

b, random error

A scientific hypothesis may turn out to be right or it may turn out to be wrong. If it is a valid hypothesis, there must be a test for proving it a. right b. wrong

b, wrong

A systematic error in the measurement will give some results larger than the true value, and some smaller. a. True b. False

b. false

In the pennies measurement the systematic error was the result of: a. faulty digital scale b. calculations of a mass of an individual pennies for each group c. deliberate grouping of pennies according to the issue date d. limited precision of the scale used

c. deliberate grouping of pennies according to the issue date

the synthesis of a large collection of information that contains well-tested and verified hypotheses about certain aspects of the world is known as a scientific a. fact b. hypotheses c. law or principle d. theory e. none of the above

d. theory