2 following
Using the
data, determine
the temperature
at which wood will
just
sink in benzene. Density of
benzene
at 0°C= 9.0x 102
kg
m 3, density
at O'C= 8.8 x 102
eksponsivity 9 benzen e lvb)? 1-2 x 100
and cubical expansivity z
wood (Yw)
-1.5 x 10-4 K --
GEOT
-3, Cubical
of wood
m3

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 ⇒

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

Which is an example of an exothermic process?