Answer:
new moon
Explanation:
A solar eclipse take place at new moon phase, when the moon passes between the earth and the sun and its shadows fall on the Earth's surface which by definition a solar eclipse.
Answer:
There will always be a shadow created by the sun shining on the moon.
When the earth is in this shadow the result is a solar eclipse,
If an observer on earth can see none of the sun then this is called a total eclipse of the sun, otherwise it will be a partial ecliplse of the sun.
Note: A solar eclipse can only occur during a "new" moon at which time the moon is not visible to an observer on earth because of the light of the sun.
Transfusion: The act of transferring blood from a healthy person, and giving it to another person.
Answer:
The new angular speed of the merry-go-round is 8.31 rev/min.
Explanation:
Because the merry-go-round is rotating about a frictionless axis there’re not external torques if we consider the system merry-go-round and child. Due that we can apply conservation fo angular momentum that states initial angular momentum (Li) should be equal final angular momentum (Lf):
(1)
The initial angular momentum is just the angular momentum of the merry-go-round (Lmi) that because it's a rigid body is defined as:
(2)
with I the moment of inertia and ωi the initial angular speed of the merry-go-round
The final angular momentum is the sum of the final angular momentum of the merry-go-round plus the final angular momentum of the child (Lcf):
(3)
The angular momentum of the child should be modeled as the angular momentum of a punctual particle moving around an axis of rotation, this is:
(4)
with m the mass of the child, R the distance from the axis of rotation and vf is final tangential speed, tangential speed is:
(5)
(note that the angular speed is the same as the merry-go-round)
using (5) on (4), and (4) on (3):
(6)
By (5) and (2) on (1):

Solving for ωf (12.0 rev/min = 1.26 rad/s):
![\omega_f= \frac{I\omega_i}{]I+mR^2}=\frac{(260)(1.26)}{260+(24.0)(2.20)^2}](https://tex.z-dn.net/?f=%5Comega_f%3D%20%5Cfrac%7BI%5Comega_i%7D%7B%5DI%2BmR%5E2%7D%3D%5Cfrac%7B%28260%29%281.26%29%7D%7B260%2B%2824.0%29%282.20%29%5E2%7D%20)
