May i have the answer choices?
Answer:
The gravitational forces between the earth and moon at an average distance between them may be expressed as (F)
Explanation:
Both the mass of the earth and the moon are doubled.The distance between the center of two are doubled.So both masses are doubled and the distance is halved.
Hope it helps!
Answer: The correct answer is B) Superconductor, conductor, semiconductor, insulator.
Resistivity to the flow of electrons is inversely related to the conductivity of the material. This means that more is the resistivity, lesser is the conductivity.
Superconductors are those materials, which have zero resistivity. Thus, they have maximum conductivity, conductors are those that have little resistivity, semiconductors have more resistivity than conductors, and insulators have maximum resistivity so they do not allow the electric current to pass through them.
Thus, B) is the right answer.
Climate change and global warming are both caused by greenhouse gas effects or pollution.
A. Keeps carbon dioxide from escaping atmosphere
and slows diffusion
B. Prevents bicarbonate formation and slows
photosynthesis
C. Provides fossil fuels and recycles carbon dioxide
D. Prevents carbon dioxide from entering
atmosphere and dissolves fossil fuels
