Maximum magnetic force is achieved when electrons move
A. perpendicular to the magnetic field direction.
B. in the same direction as the magnetic field.
C. at non-right angles to the magnetic field direction.
D. opposite to the magnetic field direction.
Answer: A
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A. North European and Middle Volga B. Siberia and the Far East C. North Caucasus D. Territories of the Far North
The mantle is composed of
A. half liquid and half rocky material. B. solid rock. C. iron-rich silicate rocks. D. iron and nickel.
The present estimate of the Earth's age is about ________ years
A) 50 million B) 500 million C) 2.8 billion D) 4.6 billion E) 2.8 trillion
What is the geothermal gradient? Describe how the geothermal gradient compares with the melting temperatures of the mantle rock peridotite at various depths
What will be an ideal response?