Two truckers are traveling directly away from each other at the same speed. if one trucker sounds her horn at a frequency of 211 hz, and the other trucker hears a frequency of 187 hz, determine the speed of the trucks. use the speed of sound as 343 m/s.

The speed of the truck is 20.68 m/s.

Explanation:

Given that,

Frequency of horn = 211 Hz

Trucker hears a frequency = 187 Hz

Speed of sound = 343 m/s

Let the speed of the truck is

We need to calculate the speed of truck

Using Doppler shift

Where, = horn frequency

f = Trucker hears a frequency

v'=speed of sound

= speed of observer

v = speed of source

Put the value in to the formula

Hence, The speed of the truck is 20.68 m/s.

when earth is in rotational motion around the sun,it displaces from its place.

when a ball is placed on an inclined surface it does both the rotational and circular motion.

explanation:

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.