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Test your basic knowledge |
MCAT Physics
Start Test
Study First
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.
Conservation of kinetic energy
4 universal forces
equal and opposite
Centripetal Force (F=- mv2/r)
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.
Friction Force
2nd Law of Thermodynamics
Kirchhoff's rules
weakest
4. ?x = Betax?xo
> static friction
Relativistic Length Contraction
velocity
no work is done
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).
Work
Resistance of a Wire
round
Real weightlessness
6. For things being tossed upwards - take all upward motion such as initial velocity as __________. Leave all
First Law of Thermodynamics
Torque
negative
Friction
7. PEGrav = P = mxgxh KELinear = K =
The displacement for a quarter around the circle (pi/4 radians or 45 degrees) - the displacement
simple harmonic motion
Mechanical Energy
velocity and displacement
8. E = moxc2
Resistance of a Wire
Energy Released by Nuclear Fission or Fusion Reaction
Thermal Expansion
equal and opposite
9. FF =
Electromagnetic force
Resistor's in parallel
Friction Force
When acceleration is constant and there is no change in direction
10. Mass/volume p= m/V
Force caused by a magnetic field on a moving charge
Poiseuille's Law
Density
Bernouilli's Equation
11. Whenever something is in the air - it's in a ___ - even when it is being tossed upwards - downwards or at an angle.
free fall
Sinusoidal motion
Average acceleration
Work - Power
12. 1/C? = 1/C1 + 1/C2 + 1/C3 + etc. **Voltages sum when capacitors are in series (V? = V1 + V2 + V3 ...)**
Postulates of Special Relativity
Resistor's in series
Capacitors in series
Magnetic Flux
13. Also called fundamental forces: Nuclear - electromagnetic - weak - gravity
4 universal forces
Three kinds of strain: unit - less ratios
Simple Pendulum
terminal velocity
14. Mass per unit of volume.?=m/V(unit : kg /m3 )
Current and Resistance
Density
Momentum
Translational motion
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
Lever
Uniform circular motion
Concept of force - units
The momentum of a bomb at rest
16. Roughly 10 orders of magnitude weaker than the strong force. Responsible for radioactive decay.
Weak force
times the cosine
Banked Circular Tracks
Ohm's Law
17. _____________ of all components of a vector equal to the vector itself.
Gravity
Simple Harmonic Motion
scalar
The vector sum
18. Instantaneous velocity has ________ - instantaneous speed does not.
Rotational equilibrium (Sum of Torque = 0)
Kirchhoff's rules
Destructive interference
a direction
19. A hypothetical pendulum suspended by a weightless frictionless thread of constant length. f = 1/ T and T=2p(sqrt L/g)
Simple Pendulum
fly off in a path tangent to the circle at the point of snap
Heating a Solid - Liquid or Gas
Thin Lens Equation
20. F = qxvxBxsin ?
> kinetic friction
Orbiting in space
Thermodynamics
Force caused by a magnetic field on a moving charge
21. On Earth - the rate of acceleration is g - which is ______.
Orbiting in space
Instantaneous velocity
9.8 m/s2
universal gravitational constant
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
Density
Quadratic Formula
2nd Law of Thermodynamics
scalar
24. Vector - has direction - rate of change in displacement.
Ohm's Law
velocity
vertical acceleration
Concept of a field
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
vector and a vector
fly off in a path tangent to the circle at the point of snap
velocity
Doppler Effect
27. P =
Weight
Current and Resistance
Simple Pendulum
Potential Energy stored in a Capacitor
28. V = f x? f = 1 / T T = period of wave
Torque
Friction
Current and Resistance
Periodic Waves
29. Accelerate toward the ground at a constant velocity.
Heating a Solid - Liquid or Gas
Destructive interference
Freely falling bodies
Snell's Law
30. 'rotational equivalent of force'; a force applied so as to cause an angular acceleration. t = FxLxsin ?
Torque
kinetic friction
Speed of a Wave on a String
There are two kind of weightlessness
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.
Resistance of a Wire
Relativistic Length Contraction
Momentum
Work - Power
32. FB = ?xVxg = mDisplaced fluidxg = weightDisplaced fluid ? = density of the fluid V = volume of fluid displaced
the normal component of gravity
Coulomb's Law
Buoyant Force - Buoyancy
Center of mass
33. The increase in volume of a substance due to an increase in temperature. Linear: ?L = Loxax?T Volume: ?V = VoxBetax?T
Linear Expansion
Thermal Expansion
Radioactive Decay Rate Law
Hooke's Law
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:
Blackbody Radiation and the Photoelectric Effect
To calculate how far did the projectile travel
Doppler effect
Uniform circular motion
35. The velocity at an instant (infinitesimal time interval).
To calculate the time the projectile is in the air
universal gravitational constant
acceleration
Instantaneous velocity
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
Resistor's in series
material properties
The momentum of a bomb at rest
effort decreases
37. Voltage created by the combination of movement and a magnetic field. Emf=N(?F/?t)
Buoyant Force - Buoyancy
Induced Voltage
Doppler Effect
Torque force at Equilibrium
38. I. Linear: strain = ?L / L II. Shear: strain = ?x / L III. Volume: strain = ?V / V
Simple Pendulum
Newton's first law - inertia
Three kinds of strain: unit - less ratios
Kirchoff's Laws
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
Spring Force - Work
de Broglie Matter Waves
Newton's first law - inertia
The displacement for a quarter around the circle (pi/4 radians or 45 degrees) - the displacement
40. Applies to objects in motion. A key sliding across the table eventually comes to a stop because of kinetic friction.
work is positive
Kinetic friction
Friction Force
Angular Speed vs. Linear Speed
41. R = ?xL / Ax ? = resistivity of wire material L = length of the wire Ax = cross - sectional area of the wire
Ohm's Law
Resistance of a Wire
Torques - lever arms
Capacitance of a Capacitor
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.
Three kinds of strain: unit - less ratios
Impulse
Amount of work done in gravitational field is path - independent
Elastic collisions
43. Uniformly accelerated motion along a straight line
normal force
To calculate the time the projectile is in the air
Average acceleration
Doppler Effect
44. Momentum is a vector - so be sure to assign _________________ when adding individual momenta in calculating the total momentum.
Stress and Strain
Capacitance of a Capacitor
one direction as positive and another as negative
Continuity of Fluid Flow
45. VL = Vcellxe - t / (L / R) I = (Vcell/R)x[ 1 - e - t / (L / R) ] L / R = t = time constant
Ideal Gas Law
normal force
Inductors during an increase in current
Torque force at Equilibrium
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.
constant
Ideal Gas Law
The displacement for a quarter around the circle (pi/4 radians or 45 degrees) - the displacement
Center of mass
47. A = Aoxe - k t = (1/2n)xA0 (after n half - lives) Where k = (ln 2) / half - life
rotational equilibrium
Thermal Expansion
Banked Circular Tracks
Radioactive Decay Rate Law
48. KErotational =
Rotational Kinetic Energy
rotational equilibrium
Centripetal Force (F=- mv2/r)
2nd Law of Thermodynamics
49. ?S = Q / T (Phase changes only: melting - boiling - freezing - etc)
Newton's second law (F = ma)
Entropy change at constant T
Freely falling bodies
To calculate the time the projectile is in the air
50. For a given mass - its weight on Earth is different from its weight on the _____.
Moon
Doppler Effect: when d is decreasing use + vo and - vs
scalar
the normal component of gravity