Answer:
(a) ω = 1.57 rad/s
(b) ac = 4.92 m/s²
(c) μs = 0.5
Explanation:
(a)
The angular speed of the merry go-round can be found as follows:
ω = 2πf
where,
ω = angular speed = ?
f = frequency = 0.25 rev/s
Therefore,
ω = (2π)(0.25 rev/s)
<u>ω = 1.57 rad/s
</u>
(b)
The centripetal acceleration can be found as:
ac = v²/R
but,
v = Rω
Therefore,
ac = (Rω)²/R
ac = Rω²
therefore,
ac = (2 m)(1.57 rad/s)²
<u>ac = 4.92 m/s²
</u>
(c)
In order to avoid slipping the centripetal force must not exceed the frictional force between shoes and floor:
Centripetal Force = Frictional Force
m*ac = μs*R = μs*W
m*ac = μs*mg
ac = μs*g
μs = ac/g
μs = (4.92 m/s²)/(9.8 m/s²)
<u>μs = 0.5</u>
In a direct current, the electric charge, or current, only flows in one direction. In an alternating current, the electric charge changes periodically.
Stationary at rest or moving with constant motion
Explanation:
If the force acting upon an object are balanced, the object must be stationary or at rest or moving with constant velocity.
According to newton's first law of motion;
"An object will remain in its state of rest or of uniform motion unless acted upon by an external force".
This suggests that body at rest has balanced forces acting upon it.
learn more:
Newton's laws brainly.com/question/11411375
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Answer:
Increases
Explanation:
In the Compton scattering experiment with x-rays,
The change in operation
![\Delta \lambda = \frac{h}{m_oc} [1-cos\theta]](https://tex.z-dn.net/?f=%5CDelta%20%5Clambda%20%3D%20%5Cfrac%7Bh%7D%7Bm_oc%7D%20%5B1-cos%5Ctheta%5D)
Now rest being constant, as \theta increases, cos\theta decreases
Hence, The change in wavelength will increase with the increase in \theta.
Hence, wavelength increases with an increase in the angle of scatttering.
The kind of cosmic accident which is believed to form many irregular shaped galaxies is known as Galactic Collisions. Galactic Collisions are cosmic accidents that create irregularly shaped galaxies. The Andromeda-Milky Way Collision is one example of galactic collision that is predicted to occur in the next four (4) billion years, where the Andromeda and the Milky Way galaxy collide will collide with each other to form a new galaxy.
