An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal (a time-varying voltage or current).
A boat is a watercraft of a large range of type and size.
A coxed four is a rowing boat used in the sport of competitive rowing.
A coxed pair is a rowing boat used in the sport of competitive rowing.
The coxswain is the person in charge of a boat, particularly its navigation and steering.
An eight is a rowing boat used in the sport of competitive rowing.
In car design, ground effect is a series of aerodynamic effects which have been exploited to create downforce, particularly in racing cars.
A loudspeaker (or loud-speaker or speaker) is an electroacoustic transducer; which converts an electrical audio signal into a corresponding sound.
Rowing, often referred to as crew in the United States, is a sport whose origins reach back to Ancient Egyptian times.
The stern is the back or aft-most part of a ship or boat, technically defined as the area built up over the sternpost, extending upwards from the counter rail to the taffrail.
In rowing, stroke is the action of propelling the boat with oars, and also a rower seated closest to the stern of the boat.
The supine position means lying horizontally with the face and torso facing up, as opposed to the prone position, which is face down.