Question

what is wavelength of a stationary wave

Answer 1

Answer:

By AAS congruency]

⇒ OB = OA [By C.P.C.T.]

i.e., O is the mid-point of AB.

Thus, CD bisects AB.

Ex 7.1 Class 9 Maths Question 4.

x 7.1 Class 9 Maths Question 4.l and m are two parallel lines intersected by another pair of parallel lines p and q (see figure). Show that ∆ABC = ∆CDA.

x 7.1 Class 9 Maths Question 4.l and m are two parallel lines intersected by another pair of parallel lines p and q (see figure). Show that ∆ABC = ∆CDA.

x 7.1 Class 9 Maths Question 4.l and m are two parallel lines intersected by another pair of parallel lines p and q (see figure). Show that ∆ABC = ∆CDA.Solution:

x 7.1 Class 9 Maths Question 4.l and m are two parallel lines intersected by another pair of parallel lines p and q (see figure). Show that ∆ABC = ∆CDA.Solution:∵ p || q and AC is a transversal,

x 7.1 Class 9 Maths Question 4.l and m are two parallel lines intersected by another pair of parallel lines p and q (see figure). Show that ∆ABC = ∆CDA.Solution:∵ p || q and AC is a transversal,∴ ∠BAC = ∠DCA …(1) [Alternate interior angles]

x 7.1 Class 9 Maths Question 4.l and m are two parallel lines intersected by another pair of parallel lines p and q (see figure). Show that ∆ABC = ∆CDA.Solution:∵ p || q and AC is a transversal,∴ ∠BAC = ∠DCA …(1) [Alternate interior angles]Also l || m and AC is a transversal,Perpendicular distance of B from AP]

x 7.1 Class 9 Maths Question 4.l and m are two parallel lines intersected by another pair of parallel lines p and q (see figure). Show that ∆ABC = ∆CDA.Solution:∵ p || q and AC is a transversal,∴ ∠BAC = ∠DCA …(1) [Alternate interior angles]Also l || m and AC is a transversal,Perpendicular distance of B from AP]= [Perpendicular distance of B from AQ]

x 7.1 Class 9 Maths Question 4.l and m are two parallel lines intersected by another pair of parallel lines p and q (see figure). Show that ∆ABC = ∆CDA.Solution:∵ p || q and AC is a transversal,∴ ∠BAC = ∠DCA …(1) [Alternate interior angles]Also l || m and AC is a transversal,Perpendicular distance of B from AP]= [Perpendicular distance of B from AQ]Thus, the point B is equidistant from the arms of ∠A.

Ex 7.1 Class 9 Maths Question 6.

In figure, AC = AE, AB = AD and ∠BAD = ∠EAC. Show 2 BC = DE.



Answer 2

Answer:

The standing wave with n = 1 oscillates at the fundamental frequency and has a wavelength that is twice the length of the string. Higher integer values of n correspond to modes of oscillation called harmonics or overtones

Explanation:

not sure