What is the main fuel consumed in the core of a red giant?
a. h
b. c
c. fe
d. he

With i really need the correct answer!

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.