Which statement correctly describes the relationship between current, voltage, and resistance? if we
select one:
a. decrease the resistance, and do not change the voltage, the current will decrease.
b. decrease the voltage, and do not change the resistance, the current will also decrease.
c. increase the resistance, and do not change the current, the voltage will remain the same.
d. increase the current, and increase the resistance, the voltage will decrease.

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Which best represents the law of conservation of mass ?

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 ⇒