The unit of sound intensity level is:

A motion is simple harmonic if the restoring force is proportional to:

If the amplitude of a mass-spring system is tripled, what happens to the period?

Electromagnetic waves are:

What is the period of a wave with frequency f=0.5 Hzf = 0.5 \,\text{Hz}? T=1fT = \frac{1}{f}​

What is the correct relationship between period and frequency?

Stem changing verbs deviate from the regular patterns of conjugation of regular verbs. When a stem changing verb is conjugated, it has a vowel change in the last syllable of the stem. These changes are communicated by using notation like (e:ie) or (o : ue). Look at the following four verbs and pick the one that is an example of a stem changing verb.

What direct object pronoun should substitute the direct object in the following sentence? Manuel está pintado la casa.

Which of the following sentences uses the verb SER and a DESCRIPTIVE ADJECTIVE?

Which of the following verbs is a REGULAR – AR verb?  The other three are IRREGULAR – AR verbs that do not follow the conjugation patterns that REGULAR – AR verbs follow.