Partial eclipse, Annular eclipse,
Total Eclipse and Hybrid Eclipse are the four different
types of the eclipses. When the Sun and Moon are exactly in line with the Earth, the annular eclipse occurs.
The new moon is invisible from the earth and it is silhouetted against the sun,
this can only be seen in annular eclipse. Annular word means ring shaped, we
can see a dark ring of fire in annular eclipse. It has five different stages
that are first contact, second contact, maximum eclipse, third contact and 4th
contact.
Answer:
convex lens and a concave mirror
a wedge is a small inclined plane
a screw is an inclined lane wkich goes round a centrral axis ... like a 'spiral' or helical staircase
easier per step ... more steps
Electrons are important to the electric current because they are able to move from one atom to another. When an atom loses an electron, it becomes positively charged and when an atom gains an electron, it becomes negatively charged.
Answer:
-20N
Explanation:
The racquet ball will bounce back with the same force.
This is in compliance with newton's third law of motion:
"action and reaction are equal but opposite"
If the ball hits the wall with an action force of 20N, the reaction force will be -20N.
The negative indicates an oppositely directed force.
