In the following descriptions identify each of the levels of measurement. indicate by using a, b, c, or d. explain why you indicated that particular level of measurement.
(i) the teacher of a class of third graders records the eye color of each student.
(ii) a meteorologist compiles a list of temperatures in degrees fahrenheit for the month of july.
(iii) the teacher of a class of third graders records the letter grade for mathematics for each student.
(iv) the teacher of a class of third graders records the percentage that each student got correct on the last science test.
(v) a film critic lists the top 50 greatest movies of all time.
(vi) an ice cream enthusiast takes note of the various ice cream flavors in his favorite ice cream shop.

The frequency of vibrations of a vibrating violin string is given by f = 1 2l t ρ where l is the length of the string, t is its tension, and ρ is its linear density.† (a) find the rate of change of the frequency with respect to the following. (i) the length (when t and ρ are constant) (ii) the tension (when l and ρ are constant) (iii) the linear density (when l and t are constant) (b) the pitch of a note (how high or low the note sounds) is determined by the frequency f. (the higher the frequency, the higher the pitch.) use the signs of the derivatives in part (a) to determine what happens to the pitch of a note for the following. (i) when the effective length of a string is decreased by placing a finger on the string so a shorter portion of the string vibrates df dl 0 and l is ⇒ f is ⇒ (ii) when the tension is increased by turning a tuning peg df dt 0 and t is ⇒ f is ⇒ (iii) when the linear density is increased by switching to another string df dρ 0 and ρ is ⇒ f is ⇒

The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface

Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these