Answer:
v = 3200 m/s
Explanation:
As we know that the frequency of the sound wave is given as
wavelength of the sound wave is given as
so now we have
so we will have
Answer:
Rhythmic Gymnastics
Explanation:
In general, the judges in the sports tend to be in charge for correcting and controlling the breaking of the rules in the particular sport. They are allowed to punish the competitors in accordance with the breaking of the rule, or they are there in order to determine weather a point is regular or not. In the rhythmic gymnastics though, and sports similar to it, the judges have different role, as they are in charge of determining the points earned by the competitors. This is done in a manner where every judge gives certain amount of points, or grades, and when those are summed up, the competitors get their total points.
Its Kinetic, hope this helps you
<span> Neutralization reactions always produce water and a salt.</span>
Answer:
The impulse needed to stop the child = -200 Ns
Explanation:
Impulse: This can be defined as the product of force and time of a body. The S.I unit of impulse is kgm/s or Ns
From newton's second law,
I = mΔv ................... Equation 1.
Where I = Impulse needed to stop the child, m = mass of the child, Δ = change in velocity of the child.
Given: m = 20.0 kg,
Δv = v-u where v =0 m/s, u = 10.0 m/s
Δv = 0-10 = -10 m/s.
Substituting into equation 1
I = 20(-10)
I = -200 Ns.
Thus the impulse needed to stop the child = -200 Ns
Note: The negative sign shows that the impulse act against the motion of the child
