June 2010 Regents Physics Exam By Elizabeth Fonfara

June 2010 Regents Physics Exam By, Elizabeth Fonfara

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equilibrium: the sum of all forces acting on an object equal zero.

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Because for every action there is an equal and opposite reaction.

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The Centripetal Force always points from the position of the object to the center of the circle because this is where the object is being spun from.

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Since the toy car is moving and then comes to a complete stop, both elastic potential energy and kinetic energy must have been converted to internal energy.

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Charged particles that are moving produce magnetic fields.

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Positive charged particles move away from the sphere. Negative charged particles move toward the sphere. Therefore, when the are put near each other the electric field lines go from positive to negative. So, in the diagram, A is negative, and B is positive.

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Therefore, choice (3) would have the smallest resistance.

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The wave is moving back and forth not up and down.

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The wavelength occurs between two identical points on subsequent waves. In this case the wavelength would be the distance between points A and C.

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The energy of a wave is always related to its amplitude.

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The light does not bend as it goes from the flint glass into medium X, therefore they must have the same index of refraction. The index of refraction for flint glass is 1. 66, so medium X must have this same index of refraction.

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One object emitting a sound wave with a specific frequency causing another object to vibrate with the same frequency is known as resonance.

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The speed of light in a vacuum = e = 8 3. 00 × 10 m/s Therefore, all electromagnetic waves have the same speed in a vacuum.

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Antiprotons have the same mass as protons, but with an opposite charge.

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The Doppler effect states that if there is motion away from each other, then the observer perceives a lower frequency. Therefore, since on Earth we are perceiving a lower frequency, the star must be moving away from Earth. (Red Shift)

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The total energy would remain constant because it would constantly cycle through gaining potential and losing kinetic then losing potential and gaining kinetic.

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Vertically upwards is positive, thus vertically downwards is negative and when it changes direction it is always zero. The only graph that goes from positive to zero to negative is graph #4.

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— friction OR — Some of the gravitational energy of the mass was converted into internal energy. Therefore, it could not return to its original height. OR — air resistance

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Infrared (between 700 nm and 1 mm. )