Sunlight, because it provides a source of energy is the answer because plants also provide a food source (please put as brainliest answer)
Momentum = mass x velocity
So both mass and velocity affect an object's momentum.
Answer:
(a) 
(b) 
Given:
Time period of Pulsar, 
Equatorial radius, R = 15 Km = 15000 m
Spinning time, 
Solution:
(a) To calculate the value of the centripetal acceleration,
on the surface of the equator, the force acting is given by the centripetal force:

(1)
where

(2)
Now, from (1) and (2):



(b) To calculate the tangential acceleration of the object :
The tangential acceleration of the object will remain constant and is given by the equation of motion as:

where
u = 



Convection because I’m in seventh grade