In the Rolling Plains ecoregion of Texas, some parts of rivers are in deep canyons and others have bottoms that are close to the level of the surrounding land. What conditions are most likely to be found in a place where a canyon has formed?
A. fast-moving water and rock that is easily eroded
B. slow-moving water and rock that is highly resistant to erosion
C. slow-moving water and rock that is easily eroded
D. fast-moving water and rock that is highly resistant to erosion

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Which transition by an electron will release the greatest amount of energy? oa ob oc od