Answer:
b.
c.
e.
h.
Explanation:
If we consider the ball,the tension is not balance by weight then the force acting will be non zero.It means that train car in not inertial frame of reference.And the same time the train car must accelerated with respected to the earth.It is not moving straight path.When train is in rest position but the string will be at the constant angle.
So the following option are correct:
b.
c.
e.
h.
Answer:
True........................
They need more oxygen to function, so gas exchange needs to increase
To calculate the center of gravity, divide total weight distance moment by total mass of the system. Thus, the center of gravity is 13 meter from left-hand side.
C. Nuclear power does not produce any form of pollution.
