Answer:
Antarctica and Australia were one landmass millions of years ago
Explanation:
Thats the answer I'm very sure of it
Fossil fuels are the largest source of energy in the US.
B.
increases as the tension of the string increases
Answer:
Part a)

Part b)

Explanation:
Part a)
As we know that initially the position vector is r
then the same magnitude position vector is rotated by 40 degree angle
so displacement magnitude is the magnitude of change in position vector
so it is given as




Part b)
now we need to find the direction of the displacement vector
so let say it makes an angle with x axis so we have


