Phys Flashcards
Inertia depends only on the characteristics of the ____, not on _____ such as gravity or position.
Inertia depends only on the characteristics of the object itself (ie, mass), not on external factors such as gravity or position.
Is gamma decay ionizing or non ionizing radiation
Ionizing
To turn while running which two forces must be accounted for when considering what the force on the foot will be?
Newton 3rd law,
Fn and Fa –> add them
Angle of refraction will be ____ than angle of reflection when entering from less to more dense material i.e. larger n value
smaller
Resonant frequency waves are known as _____ waves because the locations of the nodes and antinodes do not change
standing waves
frequency f of the first harmonic (n = 1) is called the fundamental frequency (f1), the ____ frequency standing wave that can be produced within an object
lowest
Which conditions need to be mimicked for one to face the same doppler frequent shift as another receiver?
Velocity and direct need to be same
Eqn for doppler shift in frequency
Δf/f = -v/c
- c is speed of the wave in the medium in which it propagates
- Doppler shift and velocity will always have opposite signs
- shift will be smaller for light waves bc more speed
Doppler ultrasound – blood towards observer – frequency shift is____ and velocity is ____
Doppler ultrasound – blood towards observer – frequency shift id positive and velocity is negative
The observed frequency is same as source frequency meaning
v=0, no doppler shift
For maximum effectiveness, the frequency of the shock waves should match the ____
resonance frequency of the target structure.
When finding pressure underneath water, look for
absolute pressure p = p0 + ρgh
Object suspended in water, neither floating no sinking gets pushed down, what happens?
The object will sink, and its velocity in the downward direction increases with time (accelerates) as described by Newton’s second law (F = ma).
IF FORCE removed, since object is moving, it will remain moving but NOT accelerating as no more force (Think Newton first and second law)
Refractive index eqns
Refractive index n = c/v or snells n incident / n refractive
Light is _____ in medium than vacuum because absorbed and remitted (_____is not affected)
Light loses _____ as it passes in a dense medium
Light is slower in medium than vacuum because absorbed and remitted (energy is not affected)
Light loses amplitude as it passes in a dense medium
Hyperopia is corrected by placing a converging lens in front of the eye, forming an optical system with ___optical power.
greater
images of nearby objects shift closer to the lens and onto the retina after a corrective lens is placed in front of the hyperopic eye.
Magnification signs
if m>1, image is enlarged, if m<1 image is reduced
The refractive index of light increases with its ____
The refractive index of light increases with its frequency
Spherical aberration describes the phenomenon by which
real lenses’ perfectly rounded (ie, spherical) surfaces do not produce an image at a single point, but rather at a series of focal points (not aspect of ideal lenses)
If thing that is suspended (meter stick or swing) does not have pivot point right at center, than it has extra torque from ___
its own force
What is rotational equilibrium?
rotational equilibrium associated with maintaining center of mass and pivot point (think of person getting up from chair)
Tccw=Tcw
For an unrestrained object, the pivot point is the
object’s center of mass.
