Physics - MCAT Flashcards
What is the transfer of heat through the motion of fluids such as gases or liquids?
convection
What is heat transfer through direct contact from a higher temp object to a lower temp object?
conduction
What is the heat transferred by electromagnetic waves called?
radiation
Energy transfers spontaneously in which direction: from cold to hot or from hot to cold?
from hot to cold
Do electric field lines follow protons or neutrons?
protons
What is the charge of one atomic particle (+ or -) in Coulombs?
1.602*10^19
What is the relationship between resistance and conductance?
inverse
What is the value for Coulomb’s constant k in F=k(q1q2)/r^2?
8.99x10^9 N (m^2/C^2)
If the F in Coulomb’s law (F=k(q1q2)/r^2) is a positive value, is the interaction attraction or repulsion?
repulsion
1 Amp = what?
1 Coulomb / 1 second
1 Volt = what?
1 Joule / 1 Coulomb
Equipotential lines represent what?
levels of electric potential
In a magnetic dipole, what direction do the magnetic field lines extend?
north to south - look up magnetic dipole picture
What type of compounds do not generate a magnetic field?
diamagnetic
What type of compounds have a random distribution of spin and conduct magnetance?
paramagnetic
What rule can you use to determine directionality of the magnetic field in a wire?
right hand rule - practice it! (current is right thumb and fingers are the magnetic field, back of hand is magnetic force if negative particle, palm is magnetic force if positive particle)
If a circle in a dot is used to depict a magnetic field, what direction is it?
out of the page
If a charge is moving in the same direction of a magnetic field, will it have magnetic force exterted on it?
No (F=qvBsin(theta) and theta=0 so F=0)
Is the total resistance for several resistors in parallel more or less than each individual resistor?
less review resistor equation!
What is the equation for capacitors *in parallel*?
CT=C1+C2+C3…
What is the equation for resistors *in parallel*?
1/RT = 1/R1+1/R2+1/R3…
What is the dielectric constant of a vacuum?
1 (the lowest)
What corresponds to a high *pitch*?
high frequency
What corresponds to a *loud* sound?
high amplitude
What does a fundamental, 2nd, 3rd, and 4th harmonic look like?
What types of molecules can apply a buoyant force?
fluids and gases
When a liquid has strong adhesive forces to the container it is in, will its meniscus be more concave or convex?
concave
What does the Venturi effect of flow state?
In a tube with varying cross-sectional areas, the area with the smallest area will have the greatest velocity and lowest pressure
How is the distance of an image in the human eye calculated?
It’s the lens to retina distance
What is the doppler effect?
When a perceived sound, image, or other wave is perceived as larger as it gets closer
What is the Venturi effect?
The reduction in fluid pressure when air moves through a constricted area such as a pipe. Thus, Pair>Ptube and velocity air
What are characteristics of working in a group vs working alone?
In a group - maximize cooperation, minimize conflict, produce FEWER alternatives than working alone
In what type of environment does sound travel the fastest?
In a solid
