A passenger walks toward the rear of a moving train Describe her motion as seen from a reference point on the train Then describe it from a reference point on the ground?
If the train is moving at 50 mph and the passenger is walking at 2 mph, people on the train would see her moving at 2 mph, while people outside the train would see her moving at 48 mph. 50mph - 2 mph = 48 mph
Is the adjective finely-ground correct English if not how do you describe coffee beans converted into powder?
Describe how the above ground portion and the below ground portion of the ecosystem are two interrelated and interdependent communities?
Describe your motion as seen from a reference point on the train then describe it from a reference point on the ground?
If you are *not* dealing with special relativity and its effects, then the answer becomes far more simple. If you are not moving and are standing on the ground, then you see a train moving past you a fast speed. In this case, the reference "frame" (not necessarily a point) is you and the object being described is the train. If you flipped the roles, then it would be someone on the train watching you…
According to Wikipedia: "As a general definition, altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object." ['down' is measured as depth.] If you're discussing flying altitude, it probably cannot be negative, because the reference point is the ground. In a geography which is below sea level, you could describe the altitude as negative, but more properly, you'd describe the elevation not the altitude…
An absolute reference, usually called a benchmark, is a fixed location on the ground. Frequently, it is confirmed by GPS and other more accurate instruments. A relative location is derived from a benchmark. Many survey document contain only one reference to a benchmark; all other locations are relative to the location of the controlling benchmark.
Video In digital video, a reference frame is one used to define future frames within a coding format. Physics A reference frame is a system in which observations are made about the position or properties of physical objects. It can be a coordinate system such as the Cartesian axes, or latitiude and longitude, or a set of objects with a fixed relationship that are not accelerating with respect to one another (inertial frame of reference)…
Ground reference speed is the speed of an aircraft with reference to the ground. Ground reference can also be used in watercraft by using the seabed. Watercraft can also use water reference speed, which is water flowing past the hull. The difference is that one uses the ground and the other uses the water to reference speed.
Verbs do not describe nouns, like snowflakes. They are action words. The snowflakes were falling quickly. Adjectives describe nouns, like snowflakes. The puffy, white snowflakes quickly covered the ground. Verbs that end in -ing are called present participles. Present participles can be used as adjectives, but when they are in this form, they are not called verbs. Examples: the falling snowflakes, glistening snowflakes