Please help!! What allows negative feedback to control a system?
A. The system slows down when input is reduced.
B. The system has parts that sense the amount of input.
C. The system speeds up when output is increased.
D. The system has parts that sense the amount of output.

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.