A plane -progressive wave is represented by the equation. y = 0.1 sin (200nt - 201x /17)
Where y is the displacement in millimeters, t is in seconds and x is the
distance from a fixed origin O in metres (m). Find (i) the frequency of the
wave, (ii) its wavelength, (iii) its speed, (iv) the phase difference in radians
between a point 0.25m from O and a point 1.10m from O, (v) the equation of
a wave with double the amplitude and double the frequency but travelling
exactly in the opposite direction.
3.
The equation of a certain traveling transverse wave is
y = 2 sin 271
(6.61
30)
0.01
Where x and y are in centimeters and t is in seconds. What are
(a) the amplitude
(b) the wavelength
the frequency, and

The functioning of an electron transport chain is analogous to a) a slinky toy going down a flight of stairs. b) a canoe going over a waterfall. c) a person climbing a flight of stairs one step at a time. d) a person leaping from the top to the bottom of a flight of stairs in one jump.

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 ⇒

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults