A submarine left the Azores and traveled west. Three hours later an aircraft carrier left traveling 3 mph faster in an effort to catch up to it. After seven hours the aircraft carrier finally caught up. Find the submarine's average speed.

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.

Hypothesis. why don’t you know this? i learned this stuff in like 5th grade

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

The particles of the gas inside the ball heats up, bouncing off each other and spreading farther apart.hope my answer has you : )