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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. F=mv^2/R=m?r
Centripetal Force
Friction - static and kinetic
Inelastic collisions
Electric Power
2. ?. equal to v(k/m) or - 2(pi)(f)
Angular frequency
Magnetic Field around a wire
Buoyant Force - Buoyancy
Pressure under Water
3. Total momentum before = total momentum after.
Friction Force
Center of mass
one direction as positive and another as negative
Conservation of linear momentum
4. Operation involving a ___________ always results in a vector.
material properties
vector and a scalar
Weight
> kinetic friction
5. Applies to objects in motion. A key sliding across the table eventually comes to a stop because of kinetic friction.
Energy of a Photon or a Particle
Hooke's Law
Gravity
Kinetic friction
6. Friction acts ________ to the plane surface and opposite to the direction of motion. In a non - moving object on an inclined plane: normal component of gravity = normal force; parallel component of gravity = static friction.
To calculate how far did the projectile travel
Electromagnetic force
parallel
Instantaneous speed
7. The velocity is always less or equal to the speed. The displacement is always less or equal to the distance. Displacement and velocity are vectors. Distance and speed are not.
negative
Postulates of Special Relativity
Doppler Effect: when d is decreasing use + vo and - vs
velocity and displacement
8. 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.
Anti node
Weight
Total momentum of 2 objects before a collision
Momentum
9. Centripetal force is due to centripetal acceleration. Centripetal acceleration is due to changes in velocity when going around a circle. The change in velocity is due to a constant change in direction. ?Sometimes a negative sign is used for centripet
Kirchhoff's rules
Centripetal Force (F=- mv2/r)
Linear Momentum
Sinusoidal motion
10. 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
To calculate the time the projectile is in the air
Orbiting in space
effort decreases
Potential Energy stored in a Capacitor
11. When something is laying still on an inclined plane - the normal force and friction force adds up in a _________ to equal the weight.
Change in Internal Energy of a system
To calculate the time the projectile is in the air
Translational motion
vector fashion
12. Mass per unit of volume.?=m/V(unit : kg /m3 )
Density
scalar
Speed of a Wave on a String
Thin Lens Equation
13. X = Axcos(?xt) = Axcos(2xpxf xt) ? = angular frequency f = frequency
Relativistic Mass Increase
rotational equilibrium
scalar and a scalar
Sinusoidal motion
14. Kinetic energy is __________ - so there are no positive / negative signs to worry about.
Doppler effect
Speed of a Wave on a String
vertical acceleration
scalar
15. Pulleys reduce the force you need to lift an object. The catch - it increases the required pulling distance. xComplex pulleys will have additional ropes that contribute to the pulling of the load (most likely not tested on the MCAT).
4 universal forces
Analysis of pulley systems
horizontal component
Torque force at Equilibrium
16. E= nxhxf where h = Planck's constant
Induced Voltage
Blackbody Radiation and the Photoelectric Effect
Speed - velocity (average and instantaneous)
Postulates of Special Relativity
17. The speed.
The momentum of a bomb at rest
Blackbody Radiation and the Photoelectric Effect
Lever
For displacements and distances that approach zero - the instantaneous velocity equals
18. Also called fundamental forces: Nuclear - electromagnetic - weak - gravity
Ideal Gas Law
4 universal forces
Capacitance of a Capacitor
Torque
19. F = kxx Potential Energy of a spring W =
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20. ?P = 8x?xLxQ/(pxr4) ? = coefficient of viscosity L = length of pipe r = radius of pipe Q = flow rate of fluid
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21. 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
Concept of force - units
Static friction
tangent
effort decreases
22. R = ?xL / Ax ? = resistivity of wire material L = length of the wire Ax = cross - sectional area of the wire
Instantaneous speed
To calculate how far did the projectile travel
Translational motion
Resistance of a Wire
23. E = moxc2
Energy Released by Nuclear Fission or Fusion Reaction
Electric Power
Newton's Second Law and Rotational Inertia
Angular Speed vs. Linear Speed
24. The vector sum of the momenta of all the shrapnel from the explosion.
The momentum of a bomb at rest
Quadratic Formula
one direction as positive and another as negative
Electric Power
25. The direction of instantaneous velocity is _______ to the path at that point Ave speed = distance / time = v = d/t
Newton's Second Law
Deceleration
Speed of a Wave on a String
tangent
26. ?S = Q / T (Phase changes only: melting - boiling - freezing - etc)
Entropy change at constant T
Angular frequency
Elastic collisions
Density
27. For the purposes of the MCAT - these are lines. When lines are close together - that's shows a strong field. When lines are far apart - that shows a weak field. Lines / fields have direction too - and that means they are vectors. Things travel parall
There are two kind of weightlessness
Laplace's Law
Concept of a field
Postulates of Special Relativity
28. E = hxf = mxc2 h = Planck's constant = 6.63 E(-34) J sec f = frequency of the photon
Energy Released by Nuclear Fission or Fusion Reaction
= kinetic friction
a direction
Energy of a Photon or a Particle
29. In an object going down the inclined plane at constant velocity: parallel component of gravity...
Poiseuille's Law
Rotational equilibrium (Sum of Torque = 0)
= kinetic friction
Friction - static and kinetic
30. Static friction is always ____ than kinetic friction.
terminal velocity
larger
beta (Beta) particle
The strong force: also called the nuclear force
31. When something is laying still on a horizontal surface - the normal force is ___________ to the weight.
equal and opposite
Gravity
Current and Resistance
Magnetic Flux
32. Distance and direction of an object's change in position from the starting point
Impulse
Gravity
Potential Energy stored in a Capacitor
displacement
33. There is no acceleration in the ________. The horizontal component of velocity is constant.
horizontal component
times the cosine
The vector sum
Weight
34. E=2.3110?
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35. For a given mass - its weight on Earth is different from its weight on the _____.
Continuity of Fluid Flow
Torques - lever arms
Centripetal Force (F=- mv2/r)
Moon
36. The strongest of all four forces - but it only acts at subatomic distances. It binds nucleons together.
Flow of Heat through a Solid
Potential Energy stored in a Capacitor
The strong force: also called the nuclear force
rotational equilibrium
37. Each resistor has the same current; differenct voltage drop. Total resistance = R1+R2+R3+. . .
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38. The value of speed/velocity - distance/displacement are interchangeable in this case - just keep a mental note of the direction. Ave acceleration = change in velocity / time
When acceleration is constant and there is no change in direction
round
Flow of Heat through a Solid
Thermal Expansion
39. T = torque = Ixa I = moment of inertia = mxr
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40. Logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. B (Decibel level of sound) = 10 log ( I / Io ) I = intensity of sound Io = intensity
Destructive interference
Force caused by a magnetic field on a moving charge
Decibel Scale
Elastic collisions
41. b
Quadratic Formula
Center of Mass - point masses on a line
de Broglie Matter Waves
Energy Released by Nuclear Fission or Fusion Reaction
42. DF = dq v(B sin a) = I dl(B sin a)
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43. Change in the apparent frequency of a wave as observer and source move toward or away from each other. Toward Away.
Doppler effect
universal gravitational constant
Orbiting in space
Momentum
44. Interference in which individual displacements on opposite sides of the equilibrium position are added together to form the resultant wave. Must 180 degrees out of phase
Destructive interference
Three kinds of strain: unit - less ratios
Energy Released by Nuclear Fission or Fusion Reaction
Beats
45. The acceleration produced by a net force on a body is directly proportional to the magntude of the net force - is in the same direction as the net force - and is inversely proportional to the mass of the body. Fnet = SFExt = mxa
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46. Ainxvin = Aoutxvout A= Area v = velocity
Impulse = Change in Momentum
velocity and displacement
Inelastic collisions
Continuity of Fluid Flow
47. ?x = Betax?xo
beta (Beta) particle
Speed - velocity (average and instantaneous)
Relativistic Length Contraction
Center of Mass - point masses on a line
48. Induced current flows to create a B- field opposing the change in magnetic flux
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49. In an object that begins to slip on the inclined plane: parallel component of gravity...
Speed - velocity (average and instantaneous)
Beats
> static friction
Electromagnetic force
50. 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:
Magnetic Flux
Uniform circular motion
Instantaneous velocity
Apparent weightlessness