SFA Test Review

1

• SFA Test Review

Physics I (spring)
2

• Work, Power, and Energy

• conservation of energy SEi SEf
• kinetic energy KE ½mv2
• potential energy PE mgh
• work/energy theorem Swork DKE

3

• Momentum

• momentum conservation
• Spi Spf
• inelastic collisions
• m1v1 m2v2 (m1 m2)vf
• elastic collisions
• m1v1 m2v2 m1v1f m2v2f

4

• Electricity

• Coulomb's law FE kq1q2/r²
• Ohm's law
• I V/R
• power
• P IV I2R V2/R

5

• series circuits constant current additive
  voltage additive resistance
• parallel circuits constant voltage
  additive current 1/Req 1/R1 1/R2

6

• measurement (a) ammeter low
  resistance placed in series (b)
  voltmeter high resistance
  placed in parallel

7
Magnetism

• magnetic fields
• (a) point from N to S (b) form closed loops
• (c) form concentric
• circles around wires

8

• magnetic fields from I
• magnetic fields produced
• by current are proportional
• to the amount of current
• (a) Bwire (moI)/(2pr) (b) Bsolenoid
  moIn

9

• magnetic forces
• magnetic fields may exert
• forces on moving charges
• (a) FB-particle qvB sinq (b) FB-wire
  IBL sinq
• (c) tloop NIAB sinq

10

• Waves

• wave characteristics
• (a) amplitude (A)
• (b) frequency (f in Hz) (c) wavelength (l
  in m) (d) velocity (v fl)

11

• wave properties
• (a) interference
• 1) constructive
• 2) destructive
• (b) diffraction
• (c) refraction

12

• (d) Doppler effect

high f
low f
13

• Light

• e/m characteristics
• transverse oscillations
• traveling _at_ 3.00 x 108 m/s
• e/m spectral regions
• radio micro IR
• visible UV X-rays
• gamma

14

• color
• (a) primary colors red, green, blue
• add to give white
• (b) primary pigments magenta, cyan,
  yellow
• subtract to give black

15

• wave nature
• (a) double slit interference sinq
  m(l/d)
• m(l/d) y/L
• (b) polarization
• I Iocos2q

16

• particle nature
• (a) photons Ephoton hf hc/l
  (b) photoelectric effect
• KEmax hf - f
• (c) emission spectra
• (d) absorption spectra

17

• optics
• (a) equations
• 1/f 1/di 1/do
• m -(di/do) hi/ho
• (b) ray diagrams

18

• Sound

• characteristics
• longitudinal pressure
• oscillations
• range
• infrasonic (20 Hz)
• ultrasonic (20 000 Hz)

19

• sound speed (in air)
• 1090 ft/s _at_ 0oC
• 331.5 m/s _at_ 0oC
• supersonic speeds are
• speeds that are faster
• than sound.
• mach numbers

20

• Thermodynamics

• heat/temperature
• (a) kinetic theory
• KEavg 3/2(kT)
• (b) heat flows from high to
• low temperature areas
• (c) heat flows more rapidly
• as the temperature
• difference increases.

21

• (d) heat flows well through
• conductors (such as
• metals) but poorly
• through insulators (such
• as asbestos).
• (e) heat is conserved
• Sheatlost Sheatgained

22

• heat engines
• (1) heat ? Emechanical
• W PDV
• (2) 1ST law
• DEint Qin - Wsystem
• (3) 2nd law
• e W/Qin 1 (TC/TH)