Author Question: The main fuel for producing energy in the center of the sun is A) helium. B) hydrogen. C) ... (Read 43 times)

stock · **on:** Jul 29, 2018

The main fuel for producing energy in the center of the sun is

A) helium.
B) hydrogen.
C) uranium.
D) any radioactive material.
E) oxygen.

Question 2

An object is attached to a vertical ideal massless spring and bobs up and down between the two extreme points A and B. When the kinetic energy of the object is a minimum, the object is located

A) 1/4 of the distance from A to B.
B) midway between A and B.
C) 1/ times the distance from A to B.
D) 1/3 of the distance from A to B.
E) at either A or B.