Answer:
-8 Kgm/s
Explanation:
From conservation of linear momentum, the sum of momentum before collision is equal to the sum of linear momentum after collision
The sum of momentum before collision is 15+-35=-20 Kgm/s
Momentum after collision is
x+-12=-20
x=-20+12=-8 Kgm/s
Answer:
Explanation:
Knowing that the volume of a sphere is V=(4/3)πr³ and
We must find when r=14cm
V=(4/3)πr³ ⇒
and r=14cm then
Note: as you can see the relationship of change of r with respect to t is negative because it is a decrease, and also its volume ratio
The wavelength<span> can always be determined by </span>measuring<span> the distance between any two corresponding points on adjacent </span>waves<span>. In the case of a longitudinal </span>wave, awavelength measurement<span> is made by </span>measuring<span> the distance from a compression to the next compression or from a rarefaction to the next rarefaction.
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(3 waves) / ( 2seconds) =
(3/2) / (wave/second) = 1.5 per second = <em>1.5 Hz</em>.