Based on current evidence and understanding, what is the composition at the center of Neptune and in fact at the center of all the giant planets in the outer Solar System?
A. swiss cheese.
B. liquid core made of hydrochloric acid
C. methane gas mixed with water.
D. a solid, rocky core.
E. There is no core; Neptune just has an atmosphere.
Ans: D. a solid, rocky core.
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____________ of hydrogen atom nuclei in the core replace the heat the Sun ____________ to keep it in equilibrium
a. Nuclear fusion reactions; loses into space b. Nuclear fusion reactions; gains from empty space c. Chemical reactions; loses into space d. Chemical reactions; gains from empty space e. Nuclear fission; loses into space
For a person with normal vision (near point 25 cm, far point infinity), the maximum angular magnification for a lens is 4.00. If this same lens is used with the relaxed eye, what angular magnification would result?
1.The focal length must be given to figure this out. 2.5.00 3.3.50 4.3.00
True or False? An object with constant nonzero acceleration can never stop and remain at rest
1.False 2.True
The lens in your eye and the cornea both contribute to image formation
Indicate whether the statement is true or false