# Physics Overview

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1. Percent difference
• (measured value-expected value) x 100
• expected value
2. Atomic Number is the number of
Protons
3. If a nucleus emits a beta particle then the atomic # ____ and the mass ____.
changes and stays the same
4. Solenoid equation
• μ0nI
• where n is the number of turns per length and the I is current
5. When power goes up what happens to the resistance?
it goes down
6. What happens to the current when the voltage is doubled?
It is doubled
7. what 2 things does the magnetic field in a solenoid depend on?
diameter of the solenoid and direction of the current
8. the strength of magnetic field in a solenoid depends on what two things?
current and coil number
9. in a series circuit the current...
stays the same
10. milli-
10-3
11. Kilo-
103
12. period
1/frequency
13. what does ultrasonic imaging use?
doplar effect and beats
14. sound level is measured in
decibels
15. sound intensity is measured in
watts/meter2
16. sound level equation
10dB log (intensity/I0)
17. frequency is
beats/second
18. work is
force x distance
19. power is
work over time
20. gravitational potential energy
mass x gravity x height
21. if kinetic energy is doubled what happens to the work and the force?
the work and the force also double
22. kinetic energy varies as
velocity2
23. volume is
mass/density
24. pressure is
force over area
25. density
mass/volume
26. velocity is
acceleration x time
27. how does gravitational force vary?
by distance2
28. electric field is the
difference of voltage/ spacing
29. decreasing distance by 2 does what to intensity?
it increases it by as a f factor of 4
30. Energy Stored
1/2 current x voltage2
31. voltage is
current x resistance
32. a watt is
• volts x amps
• joules/seconds
33. disipating power
• I2R
• where I is current and R is resistance
34. volts are
amps x ohms
35. a joule is
newton x meter
36. free fall equation for how far
1/2 gravity x time2
37. distance travelled equation (from rest)
1/2 acceleration x time2
 Author: Anonymous ID: 83958 Card Set: Physics Overview Updated: 2011-05-05 15:31:27 Tags: Measurement Newton laws work energy conservation buoyancy sound electricity circuits magnetic forces atom nuclear physics medicine Folders: Description: Measurement, Newton's laws, work, energy, conservation of energy, buoyancy, sound, electricity, circuits, magnetic forces, the atom, nuclear physics in medicine. Show Answers: