Answer:
South-West direction
Explanation:
Let 
be velocity of the plane relative to the air, 
be velocity of the air relative to the ground, 
is the velocity of the plane relative to the ground
therefore,
From the triangle attached, the angle characteristics to the direction of relative velocity of the plane can be found
South-West direction
For any eclipse, all three bodies are in the same straight line. For a solar eclipse, the moon is the one in the middle. For a lunar eclipse, the Earth is the one in the middle.
Answer:
1800J
Explanation:
Given parameters:
Weight of the book = 20N
Total distance covered = 45m + 15m + 30m = 90m
Unknown:
Total work performed on the books = ?
Solution:
To solve this problem we must understand that work done is the force applied to move a body through a certain distance.
So;
Work done = Force x distance
Work done = 20 x 90 = 1800J
Dark energy is what is causing the accelerating expansion of the universe. It can also be defined as the theoretical energy that counteracts or acts against gravity. Others also define it as a theoretical, new kind of dynamic energy field that fills space, but whose energy has an effect opposite to that of normal energy.
