The average rate of erosion on the Moon is far less than on Earth because
A) the crust of the Moon is much denser than the Earth's crust.
B) the Moon is much younger than the Earth.
C) the Moon lacks wind, water and an atmosphere.
D) the Moon's magnetic field protects it from the solar wind better than ours does.
E) the Moon's mare long ago dried up, so there is no more wave erosion there.
C
You might also like to view...
The magnetic field produced in a material resulting from an applied magnetic field is called the
(a) Intensity of magnetization. (b) Magnetic flux density. (c) Magnetic permeability. (d) Magnetic susceptibility
During a very cold winter, water pipes sometimes burst because
A) the ground contracts when colder, pulling pipes apart. B) water expands when freezing. C) water contracts when freezing. D) the thawing process produces pressure on the pipes. E) none of the above
The magnitude of the magnetic field that a long and extremely thin current-carrying wire produces at a distance of 3.0 µm from the center of the wire is 2.0 × 10-3 T. How much current is flowing through the wire? (?0 = 4? × 10-7 T ? m/
A) A) 30 mA B) 190 mA C) 19 mA D) 380 mA
A segment of wire carries a current of 25 A along the x axis from x = ?2.0 m to x = 0 and then along the y axis from y = 0 to y = 3.0 m. In this region of space, the magnetic field is equal to 40 mT in the positive z direction. What is the magnitude of the force on this segment of wire?
a. 2.0 N b. 5.0 N c. 1.0 N d. 3.6 N e. 3.0 N