To solve this exercise it is necessary to apply the kinematic equations of angular motion.
By definition we know that the displacement when there is constant angular velocity is
From our given data we know that,
Moreover we know that
Therefore for time t=8.1s we have,
That number in revolution is:
Here, we see that there are 15 complete revolutions
And 0.108 revolutions i not complete, so the tunable rotation is
Therefore the angle of the speck at a time 8.1s is 
Answer:
Kinetic energy is given by:
K.E. = 0.5 m v²
Susan has mass, m = 25 kg
Velocity with which Susan moves is, v = 10 m/s
Hannah has mass, m' = 30 kg
Velocity with which Hannah moves is, v' = 8.5 m/s
<u>Kinetic energy of Susan:</u>
0.5 m v² = 0.5 × 25 kg × (10 m/s)² = 1250 J
<u>Kinetic energy of Hannah:</u>
0.5 m v'² = 0.5 × 30 kg × (8.5 m/s)² = 1083.75 J
Susan's kinetic energy is <u>1250 J </u>and Hannah's kinetic energy is <u>1083.75 J</u>.
Since kinetic energy is dependent on mass and square of speed. Thus, speed has a greater effect than mass. As it is evident from the above example. Susan has greater kinetic energy due to higher speed than Hannah.
Answer:
71nC is the total charge of the rod
Explanation:
See attached file
Answer: most effective way is to practice reduce reuse and recycle for utilisation of resources
Answer:
λ = 
Explanation:
Using the De Broglie equation, the characteristic wavelength is given by:
λ = 
where
h = Planck's constant = 
Js.
p = momentum
Momentum, p, can be calculated using:
p = 
where
m = mass of the electron = 
kg
E = Energy of the electron = 13.4 keV = 
J = 
J
=> p = 
p = 
p = 
kgm/s
Therefore, characteristic wavelength, λ, is:
λ = 
λ =
