The plane of a conducting loop is oriented parallel to the x-y plane. a magnetic field is directed in the -z direction.

which one of the following actions will not change the magnetic flux through the loop?

a) decrease the area of the loop.

b) decrease the strength of the magnetic field.

c) increase the strength of the magnetic field.

d) rotate the loop about an axis that is directed in the z direction and that passes through the center of the loop.

e) rotate the loop about an axis that is directed in the y direction and that passes through the center of the loop.

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 ⇒

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

Earth's atmosphere is composed of mostly two gases. name the two gases that make up the majority of the atmosphere and use the pie chart to tell the percentages of each.