Study notes physci 105 less death part 2

Question 1

wavelength

Answer 1

the distance the wave travels during one period (units in time)

Question 2

two types of interference

Answer 2

constructive (addition) destuctive (subtraction)

Question 3

resonance

Answer 3

energy transfer from one object to another

Question 4

fundamental frequency

Answer 4

longest stnding wave a frequency can make

Question 5

doppler effect

Answer 5

the apparent shift of sound a moving observer experiences

Question 6

shock wave or sonic boom

Answer 6

source of doppler effect is moving at or faster than the speed of sound resulting in a wave “pile up”

Question 7

neucleus

Answer 7

positively charged protons

Question 8

atoms

Answer 8

negatively charged electrons

Question 9

2 kinds of charges

Answer 9

like charges repel opposites attract

Question 10

electrostatic charge

Answer 10

an excess or deficiency of electons gains an electric charge

Question 11

unit of quantity of charge(q)

Answer 11

coulomb (C)

Question 12

coulomb’s law

Answer 12

quantity of charge and distance between the charged objects

Question 13

electric potential energy

Answer 13

charge on object and work done to move it

Question 14

unit of electric potential difference

Answer 14

Volt

Question 15

unit of work done

Answer 15

(W) joule

Question 16

electric current

Answer 16

the flow of electric charge

Question 17

3 parts of electric circiut

Answer 17

voltage source, continuous path, work accomplished ie volage drop

Question 18

unit of current

Answer 18

ampere (I) coulomb/second

Question 19

current occurs with what 2 elements

Answer 19

potential difference, electric field

Question 20

opposition to curretn

Answer 20

resistance (R)

Question 21

formula for resistance

Answer 21

R=V/I

Question 22

unit of potential difference

Answer 22

Volt

Question 23

unit of resistance

Answer 23

Ohms

Question 24

ohms law

Answer 24

ohms = volt/amp

Question 25

what Is the rate of doing work?

Answer 25

power

Question 26

formula for power

Answer 26

P=W/t

Question 27

formula for electrical power

Answer 27

P=IV

Question 28

unit of power

Answer 28

watts

Question 29

north seeking pole is?

Answer 29

north pole

Question 30

south seeking pole is?

Answer 30

south pole

Question 31

transformers

Answer 31

step down or up voltage of alternating current

Question 32

batteries connected in series

Answer 32

same current , voltages add (fuses and circuit breakers)

Question 33

batteries in parelell

Answer 33

voltage same each source , current adds,resistance lowered(household circuits)

Question 34

short circuit

Answer 34

a new path of lesser resistance

Question 35

formula for resistance in series

Answer 35

Rt=R1+R2+R3+R4

Question 36

Formula for resistance in parallel

Answer 36

1/Rt= 1/(R1+R2+R3+R4)

Question 37

units for newton

Answer 37

1N=1kg M per s2

Question 38

speed of sound at sea level

Answer 38

331 m/s