Answer:
Explanation:
Given that
Wavelength λ=192 nm
So energy of photon,E
Now by putting the values
We know that
Kinetic energy given as
Calculate the average distances the car and the washer traveled from the top of the track. Record the average in Table A of your
2 answers:
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Answer: (b)
Explanation:
Given
mass of Student M=40 kg
mass of box m=3 kg
velocity of box v=8 m/s
suppose u is the velocity of the student after the throw
As there is no external force is applied so momentum is conserved
Initial momentum=final momentum=0
0=Mu+mv
Mu=-mv
Here negative sign indicates the velocity is opposite in direction i.e. opposite to the direction of the box
Answer:
69 revolutions
Explanation:
given,
initial angular velocity = 0
final angular velocity = 6 rev/s
when safety switch turned off
tub smoothly slows to rest in (t)= 13 s
total revolution of tub = ?
angular acceleration =
angular acceleration =
= 0.6 rev/s²
now,
= 30 revolution
now,
when safety switch turn off
angular acceleration =
angular acceleration =
= -0.462 rev/s²
now,
= 39 revolution
total revolution = 30 + 39 = 69 revolutions.
tub will rotate 69 revolutions