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Physics yay Flashcards | StudBud
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Physics yay
Physics yay
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1
What is a condition for total internal reflection?
must travel from high to low refractive index
angle of incidence more than critical angle
angle of incidence less than critical angle
must travel from low to high refractive index
2
How do the quarks change in beta minus decay?
up decays into down
top decays to bottom
down decays into up
bottom decays to top
3
In parallel, the total capacitance of 2 or more capacitors is C1+C2+...
True
False
4
On a stress-strain graph, where does the material extend rapidly?
yield points
elastic limit
limit of proportionality
breaking point
5
In a tube closed at one end, how many wavelengths are in the 1st harmonic?
3/4
1/2
1/4
1
6
What is centripetal force always perpendicular to?
gravity
velocity
displacement
acceleration
7
Which scan uses a ring of Gamma Detectors?
Ultrasound
X-rays
CAT scan
PET scan
8
Which is NOT a kinetic theory of gas assumptions?
forces on particles are negligible except during collisions
volume of particles is negligible compared to volume of gas
time of collisions is negligible compared to time between collisions
all collisions are perfectly inelastic
9
Which is NOT a cosmological principle?
universe is isochronous
universe is isotropic
universe is homogenous
laws of physics are universal
10
What is the area underneath a velocity-time graph?
displacement
momentum
work done
acceleration
11
The upthrust exerted on a body immersed in a fluid is equal to the volume of fluid displaced
True
False
12
What happens when resonance occurs?
frequency increases
amplitude increases
amplitude decreases
frequency decreases
13
Which of Kepler's Laws is : a line connecting a planet to the sun sweeps out equal areas in equal time intervals?
2nd
4th
3rd
1st
14
What happens to the current through an LDR in bright light?
decreases
there is no current
increases
stays the same
15
What is Faraday's Law?
size of an induced emf is such as to oppose the change that created it
direction of an induced emf is such as to oppose the change that created it
an induced emf is directly proportional the rate of change of flux linkage
an induced emf is inversely proportional to rate of change of flux linkage
16
What energy range is compton scattering used in?(MeV)
30-100
>1.02
0.5-5
10-20
17
Electric Potential is the force per unit positive charge to bring an object from infinity to that point
False
True
18
The time constant is how long it takes for pd/charge to decrease to what percentage?
66%
33%
50%
37%
19
What is the definition of workfunction?
minimum energy required to free an electron from the surface of a metal
maximum frequency required to free an electron from the surface of a metal
minimum frequency required to free and electron from the surface of a metal
maximum energy required to free an electron from the surface of a metal
20
Force is proportional to...
rate of change of momentum
velocity
momentum
speed
21
What is the maximum mass of a white dwarf?
1.44M
2.44M
0.44M
3.44M
22
Which is not a base unit?
Kelvin
Kilograms
Moles
Volts
