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.
Calculate work from ____ in FxD graph when comparing 2 points
area under graph
charged particle in E field will
accelerate
electron faces _____ acceleration than proton due to less mass and inertia (F=ma)
electron faces more acceleration than proton due to less mass and inertia (F
Electric field lines point ___ from positive charges and ____negative charges.
Electric field lines point outward from positive charges and toward negative charges.
The propagation velocity of sound waves depends on what three properties of the medium:
o Velocity increases with temperature.
o Velocity is slowest in gases, faster in liquids, and fastest in solids.
o Within a phase of matter, velocity increases with stiffness and decreases with density
Circular polarization refers to the rotation of polarization observed when two transverse waves with equal amplitude and perpendicular linear polarization propagate out of phase with one another by
90°
total intensity of light will ____ when nonpolarized light passes through a linear polarization filter
only electromagnetic radiation with an electric field oriented parallel to the axis of polarization passes through,
the total intensity of light will therefore decrease by 50% when nonpolarized light passes through a linear polarization filter
In pulley questions, forces are always ____ so W=fd only
parallel
In pulleys; Work is dispersed over tension so if two ropes present then __, If 1 then __
In pulleys; Work is dispersed over tension so if two ropes present then W/2, If 1 then W
Increasing the tilt of the ramp decreases
Fn
coeff of Fs always ___ than that of Fk
bigger
For conservative forces treat d in Work formula as
displacement
How do impurities affect boiling range
broaden it
Radioactive decay is time it takes for half of all radioactive nuclei to decay into their _________. NOT decay into radioactive nuclei
Radioactive decay is time it takes for half of all radioactive nuclei to decay into their daughter nuclei. NOT decay into radioactive nuclei
in slit experiments, light areas are ___, dark bands are ____
light areas are constructive, dark bands are destructive
Parallel resistor removed, what happens to overall resistance?
increases
doppler only concerns _____ change in velocity of sound wave form
perceived
ratio distances of objects and images are _____ to ratio heights of objects and images
equal
hi/ho = di/do
Thin-film interference describes the multicolored array generated when polychromatic light is incident on an interface formed by two semitransparent media. Localized discrepancies within the _____ of a thin film (top media) contribute to variable interference patterns that produce the colorful array.
Thin-film interference describes the multicolored array generated when polychromatic light is incident on an interface formed by two semitransparent media. Localized discrepancies within the thickness of a thin film (top media) contribute to variable interference patterns that produce the colorful array.
secondary alpha hydrogen makes the ____ product in aldol condensation
thermodynamic
What is the thin lens eqn and what unit for distance?
S=1/f=1/o+1/i
elastic or electrical potential energy when in oscillatory motion eqn
E=1/2kx^2
As capacitor discharges, voltage across it
falls
If sound bounces off imperfect reflector, which qualities of that wave remain the same vs are changed?
same: speed
change: frequency, wavelength, intensity
vertical motion eqn
vf=vi + at
stick suspended not at fulcrum, does mass of stick matter in equilibrium eqn?
yes at the mid point mass will act as force (mg)
aka torque = rF (r is distance from where suspended)
Terminal voltage is voltage ____
Emf is voltage ____
output, input
How can light be travelled along distances in a transparent medium such as glass?
Internal reflection, causes minimum loss of amplitude
Work is the product of force ____ an object and distance object moved
Force on object
i.e. 20 N pushed 50kg block, F component would still be 20 N not (50x10)N
eqn to relate uniform acceleration, distance, and time
d=1/2(at^2)
how to find specific gravity of object
given: specific gravity of liquid, mass of liquid displaced, mass of object
object mass/fluid displaced mass = specific gravity object/specific gravity liquid
Suppose a certain far-sighted person can see objects clearly no closer than 300 cm away. What is the minimum distance from a plane mirror such a person must be to see his reflection clearly?
150 because A plane mirror produces an image behind its plane at a distance equal to the object distance in front of the plane. If the sum between the object and the image distances must be at least 300 cm, then the mirror must be at half this distance, meaning 150 cm.
using a ___ voltage at a ___ current maximizes the power to the user and minimizes the heat loss in the transmission line
using a high voltage at a lower current maximizes the power to the user and minimizes the heat loss in the transmission line
