Answer:
Explanation:
Given
Power Supplied
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Efficiency of the motor 
and 



So, vacuum cleaner delivers a power of 
Not 100% but i think it'll cause the earth to rotate slightly slower, its definitely not the last one though
<span> the tangent function of 2mi/5mi = 21.8 degrees
cosine of that angle = cos (21.8 degrees)
=0.928
multiply 0.928 with 570 = 570*0.928
Closing velocity = 529.23 mph
</span><span>As the plane gets closer to radar station, tangent function becomes infinity and the cosine function becomes zero.....
</span>0*570 = 0
Answer:
B
Explanation:
In a two body collision where kinetic energy is conserved , this means the kinetic energy before collision is equal to the kinetic energy after collision.
when kinetic energy is conserved , momentum is also conserved.
m1u1 +m2u2 = m1v1 +m2v2
or
m1u1 +m2u2 = (m1+m2)v
The above equations are for bodies that undergoes elastic and inelastic collisions. It represents their momentum before and after collision which are equal