Sedimentary rocks are over 10,000 feet thick in some areas. true or fasle

True

Explanation:

Sedimentary rocks are, in average, 1800m thick, where 1m = 3.28084 ft

so 1800 meters are equivalent to 1800*3.2 ft = 5760 ft.

But this is the average, there are some areas with no sedimentary rocks at all, and some areas, like the Texas and Lousiana Gulf coasts, that have around 20,000m of sedimentary rock, and knowing that 1m = 3.2ft

20,000m is a lot more than 10,000 feet, so the statement is true.

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft