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SAT Subject Test: hysics

Subjects : sat, science, physics
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The number of digits that have been accurately measured. When combining several measurements in a formula - the resulting calculation can only have as many significant digits as the measurement that has the smallest number of significant digits.






2. A vector quantity - equal to the rate of change of the angular velocity vector with time. It is typically given in units of rad/s2.






3. A quantity that possesses a magnitude but not a direction. Mass and length are common examples.






4. The line perpendicular to a surface. There is only one normal for any given surface.






5. The process by which a solid turns directly into gas - because it cannot exist as a liquid at a certain pressure.






6. A positively charged particle that - along with the neutron - occupies the nucleus of the atom.






7. When electromagnetic radiation shines upon a metal - the surface of the metal releases energized electrons. The way in which these electrons are released contradicts classical theories of electromagnetic radiation and supports the quantum view accord






8. A particle - identical to an electron. Beta particles are ejected from an atom in the process of beta decay.






9. The bending of light at the corners of objects or as it passes through narrow slits or apertures.






10. The dot product of the area and the magnetic field passing through it. Graphically - it is a measure of the number and length of magnetic field lines passing through that area. It is measured in Webers (Wb).






11. States that the net work done on an object is equal to the object's change in kinetic energy.






12. A reference frame in which Newton's First Law is true. Two inertial reference frames move at a constant velocity relative to one another. According to the first postulate of Einstein's theory of special relativity - the laws of physics are the same i






13. The amplification of one wave by another - identical wave of the same sign. Two constructively interfering waves are said to be "in phase."






14. The straight line that runs through the focal point and the vertex of a mirror or lens.






15. The amount heat necessary to cause a substance to undergo a phase transition.






16. The angle between a refracted ray and the line normal to the surface.






17. The stable position of a system where the net force acting on the object is zero.






18. In the graphical representation of vectors - the tip of the arrow is the pointy end.






19. When a light ray strikes a surface - the angle of incidence is the angle between the incident ray and the normal.






20. Another word for the frequency of a sound wave.






21. A constant in the numerator of a formula.






22. Waves carried by variations in air pressure. The speed of sound waves in air at room temperature and pressure is roughly 343 m/s.






23. A neutrally charged particle that - along with protons - constitutes the nucleus of an atom.






24. The substance that is displaced as a wave propagates through it. Air is the medium for sound waves - the string is the medium of transverse waves on a string - and water is the medium for ocean waves. Note that even if the waves in a given medium tra






25. With spherical mirrors - the radius of the sphere of which the mirror is a part.






26. A sheet - film - or screen with a pattern of equally spaced slits. Typically the width of the slits and space between them is chosen to generate a particular diffraction pattern.






27. The longest side of a right triangle - opposite to the right angle.






28. Two oscillators that have the same frequency and amplitude - but reach their maximum displacements at different times - are said to have different phases. Similarly - two waves are in phase if their crests and troughs line up exactly - and they are o






29. The units of frequency - defined as inverse-seconds (1 Hz = 1 s-1). "Hertz" can be used interchangeably with "cycles per second."






30. The application of kinematics to understand why objects move the way they do. More precisely - dynamics is the study of how forces cause motion.






31. A device that breaks incoming light down into spectral rays - so that one can see the exact wavelength constituents of the light.






32. When dealing with reflection or refraction - the incident ray is the ray of light before it strikes the reflecting or refracting surface.






33. The distance between the focal point and the vertex of a mirror or lens. For concave mirrors and convex lenses - this number is positive. For convex mirrors and concave lenses - this number is negative.






34. Waves in which the medium moves in the direction perpendicular to the propagation of the wave. Waves on a stretched string - water waves - and electromagnetic waves are all examples of transverse waves.






35. The movement of a rigid body's center of mass in space.






36. Given the period - T - and semimajor axis - a - of a planet's orbit - the ratio is the same for every planet.

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37. The principle stating that for any isolated system - linear momentum is constant with time.






38. The effect of force on rotational motion.






39. A push or a pull that causes an object to accelerate.






40. When an object is held in circular motion about a massive body - like a planet or a sun - due to the force of gravity - that object is said to be in orbit. Objects in orbit are in perpetual free fall - and so are therefore weightless.






41. The force between two surfaces moving relative to one another. The frictional force is parallel to the plane of contact between the two objects and in the opposite direction of the sliding object's motion.






42. The mass number - A - is the sum of the number of protons and neutrons in a nucleus. It is very close to the weight of that nucleus in atomic mass units.






43. In an interference or diffraction pattern - the places where there is the most light.






44. The force that binds protons and neutrons together in the atomic nucleus.






45. A wave that interferes with its own reflection so as to produce oscillations which stand still - rather than traveling down the length of the medium. Standing waves on a string with both ends tied down make up the harmonic series.






46. A transverse traveling wave created by the oscillations of an electric field and a magnetic field. Electromagnetic waves travel at the speed of light - m/s. Examples include microwaves - X rays - and visible light.






47. A coefficient that tells how much a material will expand or contract lengthwise when it is heated or cooled.






48. The energy of a particle moving in space. It is defined in s of a particle's mass - m - and velocity - v - as (1/2)mv2.






49. The constant of proportionality in Newton's Law of Gravitation. It reflects the proportion of the gravitational force and - the product of two particles' masses divided by the square of the bodies' separation. N · m2/kg2.






50. If the net torque acting on a rigid body is zero - then the angular momentum of the body is constant or conserved.







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