Momentum Conservation One object m1 has a mass of 2 kg and moves with a speed of 9 m/s to the right. Another object m2 has a mass of 3 kg and moves to the left with a speed on 3 m/s. The two objects collide. After the collision, the first object m1 moves to the right with a speed of 1.5 m/s. The second object m2 moves to the right at 2 m/s. Item at position 5 5 1 point What type of collision is this? Inelastic Super-elastic Perfectly inelastic Elastic

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 ⇒

How do we measure or think of speed in the united states?

Is the portion of the electromagnetic spectrum that has a frequency just above that of visible light.