Which statement best supports the claim that there is such a thing as a perfect pitch? a. a faster pitch is harder to hit than a slower one. b. a ball can be fired in such a way that it comes straight back once it hits the bat. c. a batter who can''t figure out where a ball is going doesn''t know where to swing. d. a splitter sends the ball zipping quickly toward the batter but then causes the ball to appear to drop as it nears home plate.

The velocity of a curling stone is due east. what will be the direction of the momentum of the curling stone as it moves?

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law

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 ⇒