Answer:
Fc = 1579 [N]; ac = 15790.9 [m/s^2]
Explanation:
To solve this problem we must use the following formula that relates the centripetal force to the speed of rotation and the radius of rotation, respectively.
a)
where:
Fc = centripetal force [N]
m = mass [kg]
v = tangential velocity [m/s]
r = radius [m]
We have to give a mass to the stone in order to solve the problem, for this case we will say that the mass is equal to 100 [g].
The tangential velocity is equal to the product of the angular velocity (rotational) by the turning radius
v = w * r
But we need to convert the angular velocity units of revolutions per second to radians per second
v = 25.13*25 = 628.31[m/s]
Now replacing in the first equation:
![F_{c}=0.1*\frac{628.31^{2} }{25} \\F_{c}= 1579 [N]](https://tex.z-dn.net/?f=F_%7Bc%7D%3D0.1%2A%5Cfrac%7B628.31%5E%7B2%7D%20%7D%7B25%7D%20%5C%5CF_%7Bc%7D%3D%201579%20%5BN%5D)
b)
The second part will be only:
![a_{c}=\frac{v^{2} }{r} \\a_{c}=\frac{628.31^{2} }{25} \\a_{c}=15790.93[m/s^{2} ]](https://tex.z-dn.net/?f=a_%7Bc%7D%3D%5Cfrac%7Bv%5E%7B2%7D%20%7D%7Br%7D%20%5C%5Ca_%7Bc%7D%3D%5Cfrac%7B628.31%5E%7B2%7D%20%7D%7B25%7D%20%5C%5Ca_%7Bc%7D%3D15790.93%5Bm%2Fs%5E%7B2%7D%20%5D)
Answer;
C. outer core.
Scientists think that the outer core, made of liquid iron and nickel, moves to produce Earth’s magnetic field
Explanation;
-The earth's magnetic field is believed to be generated deep down in the Earth's core. The outer core, a 2,000 km thick layer of iron, nickel, and small quantities of other metals. It has lower pressure than the inner core which means the metal here is fluid.
-In the Earth, the liquid metal that makes up the outer core passes through a magnetic field, which causes an electric current to flow within the liquid metal. The electric current, in turn, creates its own magnetic field—one that is stronger than the field that created it in the first place.
<span>The
answer is B. When the system absorbs energy, the molecules gain more kinetic energy
and hence start to move faster. Doubling the size of the system also gives
more room for the molecules to move randomly around
the system <span>before colliding with other molecules
hence increasing their motion. </span></span>
Answer:
circular motion
Explanation:
Circular motion can be regarded as
movement of particular object along the circumference in a circle. It is
rotation of particular object along a circular path. Circular motion could be
uniform, along with constant angular rate of rotation as well as constant speed. It could also be non-uniform along with changing rate of rotation. The acceleration that is been experienced when one is in uniform circular motion is called"Centripetal acceleration"
Convection currents is type of current that takes place after a reservoir of fluid has been heated at the bottom, then cool at the top.the fluid expand as a result of Heat , then density decreases, the plates on top of them is been carried as a result of circular motion of the convection
