Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science 30 > Physics 30 > Flashcards

Physics 30 Flashcards

Momentum and Impulse,

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is momentum?

And the equation?

A

“mass in motion”

p=mv in Ns or Kg x m/s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is impulse?

And the equation?

A

Change in momentum

Δp= FΔt = m( vf-vi )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the area under a force vs time graph?

A

Impulse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the conservation of momentum?

What is an isolated system?

A

P before = P after

Within an isolated system.

An isolated system is when no external forces are present.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What types of 1D collisions are there?

There equations

A

Two objects collide and couple/stick

Two objects collide and move off separetely

two objects together fly together apart in opposite direction. Often from a stand still. *recoil

M1Vi1 + M2Vi2 = Mtotal Vf
M1Vi1 + M2Vi2 = M1Vf1 + M2Vf2
0 = M1Vf1 + M2Vf2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the steps for a 2D collision?

A
  1. Separate x + y vectors
  2. Right Triangle (head to tail)
  3. Find the resultant ( hypotenuse )
  4. Find angle
  5. Compass
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is elastic vs inelastic collisions?

A

An elastic collision conserves Ek
-> total Ek before = total Ek after
An inelastic doesn’t
-> often when two objects collide and stick

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the three methods of transfer?

A

Friction- rubbing two surfaces together
Conduction- point contact
Induction- no touch and indirect transfer of electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

In what direction does an electric field flow?

Between parallel plates does this value change?

A

from positive to negative

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does it mean when an atom of object is suspended in a parllel plate?

A

Fg= Fe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What direction does a magnetic field flow?

A

from the N into the south

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What does your hand represent in hand rules?

A

Palm - Fm
Fingers- Field direction
Thumb - Direction of particle
Left hand- negative
Right hand - Positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

If the wire is coiled what is the hand rule?

A

Field is wrapped following wire
Thumb points N

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What rules go along with bar magnets?

A

Wrist is N
Fingers S

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is Lenz’s Law?

A

Movement of magnet creates a B that opposes the movement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is an EMR?

A

Acceleration of charged particles through perpendicular E and B fields

17
Q

What are the wavelength of visible light?

A

Frequency is 10^15
Wavelength 10^-7

Red 800nm
Purple 350nm

18
Q

What are the formulas for Michelson?

A

c=d/t ; d is the distance there and back
t=T/ number of sides of mirror
T=1/f

19
Q

What is the same about EMR between different mediums?

A

Frequency

20
Q

What angle do you use in refraction problems?

A

The angle between the normal and the ray

21
Q

What is total internal reflection?

A

the minimum angle that causes a ray to reflect

22
Q

When a light ray goes through a prism what occurs?

A

Light is separated into colors and the purple (smaller) wavelengths refract more

23
Q

What occurs when light passes through a diffraction grating?

A

Light is separated into colors and the red ( longer wavelengths ) refract more

24
Q

When can you use λ=dx/nl?

A

When the angle is less than 10 degrees

25
Q

What are the things to remember about a Photoelectric Effect graphs?

A

Slope= h
Y inter= W
X inter = fo

26
Q

What is the Compton Effect?

A

Proved light acts like a particle.

Light ray collides with an electron

27
Q

Is compton effect an elastic collision?

A

Yes

Energy and momentum are conserved

28
Q

Hot dense material will?
Hot gas will?
Cold gas will?

A

Raindow
Emit light
Absorb light

29
Q

What is binding energy?

A

Eb=mc^2

The energy required to separate the nucleus

30
Q

What is mass defect?

A

Difference in mass between nucleons and the mass of the atom

E=mdc^2

31
Q

What is an alpha decay?

A

emits 4/2α particle or 4/2He

conserve nucleons

32
Q

What is a beta negative decay?

A

Emmision of a high energy electron

Neutron becomes proton

Electron is lost as a antineutrino -v or electron

33
Q

What is a beta positive decay?

A

Emmision of a high level positron(+e) or neutrino (v)

34
Q

What is a Gamma decay?

A
  • No change in element
  • Emmision of a high energy gamma ray
  • not influenced by electric or magnetic fields

Science 30 (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions