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MCAT Physics

Subjects : mcat, science
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. When something is laying still on a horizontal surface - the normal force is ___________ to the weight.






2. V = IxR V = voltage applied I = current R = resistance


3. The 'distance' is the distance from the center of mass between the two objects. Gravity is the _______ of the four universal forces.






4. ?x = Betax?xo






5. Even though they are accelerating toward the Earth - they never crash into the Earth's surface because the Earth is _____ (the surface curves away from the satellite at the same rate as the satellite falls).






6. For things being tossed upwards - take all upward motion such as initial velocity as __________. Leave all






7. PEGrav = P = mxgxh KELinear = K =






8. E = moxc2






9. FF =






10. Mass/volume p= m/V






11. Whenever something is in the air - it's in a ___ - even when it is being tossed upwards - downwards or at an angle.






12. 1/C? = 1/C1 + 1/C2 + 1/C3 + etc. **Voltages sum when capacitors are in series (V? = V1 + V2 + V3 ...)**






13. Also called fundamental forces: Nuclear - electromagnetic - weak - gravity






14. Mass per unit of volume.?=m/V(unit : kg /m3 )






15. It makes things accelerate - change velocity or change direction. In the MCAT - it is indicated by an arrow. The direction of the arrow is the direction of the force. The magnitude of the force is often labeled beside the arrow. F=ma - so the unit f






16. Roughly 10 orders of magnitude weaker than the strong force. Responsible for radioactive decay.






17. _____________ of all components of a vector equal to the vector itself.






18. Instantaneous velocity has ________ - instantaneous speed does not.






19. A hypothetical pendulum suspended by a weightless frictionless thread of constant length. f = 1/ T and T=2p(sqrt L/g)






20. F = qxvxBxsin ?






21. On Earth - the rate of acceleration is g - which is ______.






22. The law of inertia basically states the following: without an external force acting on an object - nothing will change about that object in terms of speed and direction. In the absence of an external force: xSomething at rest will remain at rest - So


23. The principle whereby every energy transfer or transformation increases the entropy of the universe. Ordered forms of energy are at least partly converted to heat - and in spontaneous reactions - the free energy of the system also decreases. ?U = QAd






24. Vector - has direction - rate of change in displacement.






25. 1/R? = 1/R1 + 1/R2 + 1/R3 + etc. **When resistors are in parallel - the voltage drop is equal across the entire combination - i.e. V? = V1 = V2 = V3 = ...**


26. A measure of both the speed and direction of a moving object. V=?x/?t






27. P =






28. V = f x? f = 1 / T T = period of wave






29. Accelerate toward the ground at a constant velocity.






30. 'rotational equivalent of force'; a force applied so as to cause an angular acceleration. t = FxLxsin ?






31. mv - where m is mass - v is velocity and the symbol for momentum is p. xImpulse = Ft - where F is force and t is the time interval that the force acts.






32. FB = ?xVxg = mDisplaced fluidxg = weightDisplaced fluid ? = density of the fluid V = volume of fluid displaced






33. The increase in volume of a substance due to an increase in temperature. Linear: ?L = Loxax?T Volume: ?V = VoxBetax?T






34. a = v^2/r f= mv^2/r cir = 2TT*r xnote that theta is always in radians. To convert degrees to radians - use this formula:






35. The velocity at an instant (infinitesimal time interval).






36. The distance of pulling increases by the same factor that the _______.If the weight of the box is 100 N - you have to pull with a force of 100 N. For every 1 meter you pull - the box goes up 1 meter. When there is one moving pulley - the force needed






37. Voltage created by the combination of movement and a magnetic field. Emf=N(?F/?t)






38. I. Linear: strain = ?L / L II. Shear: strain = ?x / L III. Volume: strain = ?V / V






39. For light: Ep = hxf = hxc / ? = pxc Therefore - momentum: p = h / ? Similarly for particles - p = mxv = h / ? - so the matter wave's wavelength must be ? = h / m v






40. Applies to objects in motion. A key sliding across the table eventually comes to a stop because of kinetic friction.






41. R = ?xL / Ax ? = resistivity of wire material L = length of the wire Ax = cross - sectional area of the wire






42. Unlike friction - gravity always acts downwards. Thus - it does not matter what detour you take because sideward motion perpendicular to the gravitational force involves no work.






43. Uniformly accelerated motion along a straight line






44. Momentum is a vector - so be sure to assign _________________ when adding individual momenta in calculating the total momentum.






45. VL = Vcellxe - t / (L / R) I = (Vcell/R)x[ 1 - e - t / (L / R) ] L / R = t = time constant






46. PxV = nxRxT n = # of moles of gas R = gas law constant = 8.31 J / K mole. - law that states the math relationship of pressure (P) - volume (V) - temperature (T) - the gas constant (R) - and the number of moles of a gas (n); PV=nRT.






47. A = Aoxe - k t = (1/2n)xA0 (after n half - lives) Where k = (ln 2) / half - life






48. KErotational =






49. ?S = Q / T (Phase changes only: melting - boiling - freezing - etc)






50. For a given mass - its weight on Earth is different from its weight on the _____.