D.sound insulators prevent from being transmitted better than elastic solids
Explanation:
The correct option from the given choices is that, sound insulators prevent sound from being transmitted better than elastic solids.
Sound is a form of wave that transmits energy from one point to another.
This wave form is a longitudinal wave in nature.
During the propagation of sound, it requires a material medium to move.
Sound insulators are special materials designed not to transmit sound energy.
Such materials cuts off sound. They are better than elastic solids in preventing sound transmission.
learn more:
Sound wave brainly.com/question/3619541
#learnwithBrainly
Answer:
Explanation:
The period equation for a pendulum is given by:
and we know that T = 1/f, where f is the frequency, so we will have:
Now, we just need to solve this equation for L.
- g is the gravity in Bogota (g=9.78 m/s^{2})
- f is 10 Hz
- L is the lenght of the pendulum
I hope it helps you!
Answer:
the weight of the rider is 493.53 N
Explanation:
Given the data in the question and as illustrated in the image below,
Tension T = 1900 N
the rider is moving at a constant speed so the net force in the horizontal direction will be 0
In the horizontal direction
F
cos( 30° ) = Tcos ( 17° )
F = Tcos( 17° ) / cos( 30° )
F = 1900cos( 17° ) / cos( 30° )
F = 2098.07 N
Now, In the vertical direction,
F sin( 30° ) = W + T sin( 17° )
W = F sin( 30° ) - T sin( 17° )
W = 2098.07sin( 30° ) - 1900sin( 17° )
W = 1049.035 - 555.506
W = 493.53 N
Therefore, the weight of the rider is 493.53 N
The right answer for the question that is being asked and shown above is that: "A. Machines increase the amount of force required to do a task. " The statement that is true about machines is that <span>A. Machines increase the amount of force required to do a task. </span>
Answer:
45000 Kg.m/s
Explanation:
change in momentum = m( v¹-vi)
=3000(25-10)
= 45000
