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As more air leaves the balloon, the faster the rate the air escapes. Since the volume is decreasing at a faster rate as time goes by, the relative volume of the balloon would be experiencing negative acceleration.

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The water filter tube is considered a refraction. The waves of the tube that pass through the water result in a surrounding environment where the waves changes speeds, making the light ray bend so that our eyes see the tube be located in a different position than before passing through the water.

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Specifically looking at the pink candle, this picture is a good example of a reflection. It is a model of specular light reflection, where the reflection occurs on a flat surface creating a mirrored image of the candle. In our perspective, this candle's right to left image is the same as the left to right image on the mirrored candle.

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Since the rocket is falling due to the gravity of the planet, with no other force it demonstrates free falling.

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Newton's first law states that: an object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an unbalanced force. This means that the arrow would remain the same resting position until it's acted upon by an external force.

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Since kinetic energy is based on the speed of the object squared, this skier demonstrates high kinetic energy because (s)he is moving  with a high velocity.

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Since the skier is moving to the right with an increasing velocity, this picture illustrates him/her in positive acceleration.

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The spring presented below is a great example of harmonic motion because once a mass has been placed in the spring, the displacement, potential energy and kinetic energy will follow the shape of a sinusoidal wave.

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This Pro-X Advanced cleaning system operates through circular motion. This would be considered an example of centripetal acceleration because as it moves in circular revolutions, the device also has a constant angular velocity; The centripetal acceleration is what allows the tangential velocity to change constantly at the same time keep a constant angular velocity.

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This picture is a great example of high potential energy because the amount of energy the boat has is dependent on the height of the boat in the air. If the balloons were to be popped, the high potential energy would be converted to kinetic energy.