A student draws a distance verses time graph to describe the motion of a model train. What does a horizontal section of the graph indicate about the motion of the train?

An object is dropped from a tower, 400 ft above the ground. the object's height above ground t seconds after the fall is s(t)equals400 minus 16 t squared. determine the velocity and acceleration of the object the moment it reaches the ground. the velocity of the object the moment it reaches the ground is nothing ft/s.

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?