Pretend for a day your non-dominant hand is broken and you can’t use of it. Pay attention to the activities you do every day. Yo
1 answer:
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Answer:
The speed of the apple will be 2.81 m/s when the arrow enters it.
Explanation:
We can find the speed of the apple by conservation of linear momentum:
Where:
is the mass of the apple = 100 g = 0.1 kg
is the mass of the arrow = 2.5 g = 0.0025 kg
and
is the initial and final speed of the apple respectively
and
is the initial and final speed of the arrow respectively
Since the apple was originally at rest ( = 0) and knowing that
=
when the arrow enters into the apple, we have:
Therefore, the speed of the apple will be 2.81 m/s when the arrow enters it.
I hope it helps you!
#1
Wavelength = 13 km
it vibrates 10 times each minute
so the frequency is defined by the number of vibrations per second
now the speed of wave is defined as
<em>so here velocity of wave is 2.2 km/s</em>
#2
Intensity of wave is directly proportional to the square of its amplitude
so we can say
k = constant
so if amplitude is doubled then its intensity will be increased by its square
<em>so intensity is 4 times</em>