1. How can a person sing into a piano and cause a piano wire to vibrate? A. The person sings at the same frequency as the piano wire, called the resonance frequency.

B. The person sings at a different frequency than the piano wire, called the beat frequency.

C. The person sings at the same frequency as the piano wire, called the beat frequency.

D. The person sings at a different frequency than the piano wire called the resonance frequency.

please help

show the diagram then i will answer

multiply 2kg by latent heat of vap

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s