which of the following accurately describes how scientist uses models? A) To make direct observations of a natural object, process, or system B) To make science seem more complex and inaccessible C) To make measurements of an object, process, or system as it is in nature D) To represent objects, process, and systems that are to large, to small, or to complex to study directly.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

In the united states, tornadoes generally occur because of the freezing of ocean water underwater earthquakes meeting of cool and warm air masses shifting of warm and cool ocean currents

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?