Water collects in small cracks in a rock, then freezes. The expansion of the water while frozen causes the rock to crack further, and eventually break off in pieces. What is the name of this process? deposition

chemical weathering

physical/mechanical weathering

erosion

Wavelength divides in half and speed stays the same.

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

Attach the free body diagram and i will you answer the question.! : d