MCAT Physics

C=change in volume/change in pressure

Compliance

Q=v1A1=v2A2

Continuity equation where Q is flow, v is linear velocity, and A is cross sectional area. As area/radius decreases, velocity increases to maintain constant flow

πr²

Radius of circular pipe with cross sectional area

KE=1/2mv²

Kinetic energy equation

P1 + 1/2pv1² + pgh1=P2 + 1/2pv2² + pgh2

Bernoulli’’s equation where P is absolute pressure, p is density, v is linear velocity, g is acceleration due to gravity, h is height. Shows that velocity increases, pressure decreases

Constructive interference

When waves are in phase of each other. They combine to make a larger amplitude

Destructive interference

When waves are out off phase of each other. They clash and produce a smaller amplitude

What is the highest frequency that humans can perceive?

20,000Hz or 0.02MHz

Longitudinal waves

wave moves parallel or in the same direction as the propagation (moving a slinky back and forth)

Transverse waves

wave moves perpendicular to the direction of propagation (moving a slinky up and down)

p=mV

density equation

In what condition will temperature can change when heat is added to it

a isothermal process will resist changes in temperature. Example of isothermal process is a phase change

What does a ammeter do and what characteristics must it have to be good

A ammeter measures current at some point in a circuit. It has a low internal resistance and does not allow for much dissipation of current to produce accurate readings

Kirchhoff’s junction rule

at any point or junction in a circuit, the sum of the currents directed into that point equals the sum of currents directed away from that point

Conservation of electric charge

charge is neither created nor destroyed