Read these sentences from the text. "Freed and his colleagues studied the New Madrid faults for 10 years.

"They expected to see the ground slowly twisting and turning, causing stress to build up in the rocks."

Why did Freed and his colleagues expect to see the ground slowly twisting and turning?

because tectonic plates fit together like pieces in a jigsaw puzzle
because most earthquakes happen at the boundaries of tectonic plates
because California lies atop a boundary where the Pacific Plate meets the North American Plate
because the movement of the ground on either side of a fault is usually what causes stress to build up in rock

Using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.