A cave diver enters a long underwater tunnel, when her displacement with respect to the entry point is 20m, she accidentally drops her camera but she doesn't notice it missing until she is some 6m farther into the tunnel. She swims back 10m but cannot find the camera, so she decides to end the dive. How far from the entry point is she?Taking the positive direction out of the tunnel, what is her displacement vector relative to the entry point?

The metric unit of electrical power is the watt volt ampere ohm

Can anybody me with this? ? (picture included.)

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 ⇒