If a wave is incident on a hard surface 1 at an angle of 30o as shown in the above diagram, find
i. the angle of reflection on hard surface 1
ii. the glancing angle on hard surface 1
iii. the angle between the incident wave and reflected wave on hard surface 1
iv. the angle of deviation of the wave on hard surface 1.
v. the angle of reflection on hard surface
vi. the angle of incidence on hard surface 2
vii. the angle of reflection on hard surface 2
viii. the glancing angle on hard surface 2
ix. the angle between the incident wave and reflected wave on hard surface 2
x. the angle of deviation of the wave on hard surface 2
xi. the total angle of deviation of the wave from beginning to the end. .

Which feature indicates that mars resides in the inner region of the solar system

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 ⇒

The necleus of an atom is made up of what subatomic particles?