defenitions

Question 1

Resistance

Answer 1

potential difference/ current

Question 2

pressure

Answer 2

force/area

Question 3

plastic deformation

Answer 3

when the load is removed and the object does not return to its original shape or length

Question 4

power

Answer 4

power is the rate of doing work

power = work done/ time

power= energy transfered/ time

Question 5

spontaneous radioactive decay

Answer 5

decay occurs and cannot be affected by external/environmental factors or two stated factors such as chemical/pressure/temperature/humidity

Question 6

Internal energy

Answer 6

sum of potential energy and kinetic energy of atoms or molecules

Question 7

Thermals equilibrium

Answer 7

the condition under which two substances in physical contact with each other exchange no heat energy. They will be at rhe same temperature

Question 8

Amplitude modulation

Answer 8

amplitude of carrier wave varies in synchrony with displacement of inforamtion signal

Question 9

noise

Answer 9

unwanted energy or power that is random

Question 10

antiquark

Answer 10

the anti matter partner of the quark

Question 11

anti particle

Answer 11

the generic term for an anti matter partner of a particle

Question 12

newtons 1st law

Answer 12

a body continues at constant velocity unless acted on by a resultant force

Question 13

Newtons 2nd law

Answer 13

force = rate of change of momentum/ time F=M/A

Question 14

Newtons 3rd law

Answer 14

for every action there is an equal and opposite reaction.

Question 15

newtons law of gravitation

Answer 15

force is proportional to the product of the masses and ivnversly porportional to the square of the seperation

Question 16

law of conservation of mommentum

Answer 16

for a collison occurring between 2 objects ina isolatex systum the total mommentum of both objects before the collision is equal to the total mommentum of the two objects after the collision.

Question 17

hook’s law

Answer 17

the force needed to extend or compress a spring by some distance is proportional to that distance.

Question 18

electromagnetic waves in order

Answer 18

in order of inreasing frequenct

Raging Martians Invaded Venus Using Xray Guns

Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, Xrays, Gamma rays

Question 19

Acceleration

Answer 19

change in velocity/ time taken or rate of change in velocity

Question 20

frequency of a sound wave

Answer 20

20Hz-20KHz

Question 21

wavelength of Gamma Ray

Answer 21

less than 0.01nm wavelength

Question 22

wavelength of xray

Answer 22

0.01nm- 10 nm

Question 23

wavelength of ultra violet

Answer 23

10nm- 400 nm

Question 24

wavelength of visible light

Answer 24

400nm-700nm

Question 25

wavelength of infa red

Answer 25

700nm-1x10^6nm

Question 26

microwave wavelength

Answer 26

1x10^6 nm -1x10^7 nm

Question 27

wavelength of radio wave

Answer 27

1x10^7nm - 1x10^9

Question 28

weight equation

Answer 28

weight= mass x gravity

Question 29

momentum equation

Answer 29

momentum= mass x velocity

Question 30

suvat equation

Answer 30

``` s=ut + 1/2at s=1/2(v+u)t v= u +at v^2=u^2 + 2as s=vt - 1\2at^2 ```

Question 31

resistance, voltage, current, power equations ( there are four of them)

Answer 31

V=IxR P=IxV P=I^2xV P=V^2/R

Question 32

current charge time equation

Answer 32

I=🔺Q/🔺t

Question 33

fundamental wave equation for light waves

Answer 33

speed of light= frequency X wavelength

Question 34

work done equation

Answer 34

work done = force x distance

Question 35

kinetic energy equation

Answer 35

Ke=1/2mv^2

Question 36

denfition of kinetic energy

Answer 36

kinetic energy is the energy possessed by virtue of its motion

Question 37

kinteitc energy mommentum mass equation

Answer 37

K.E= momentum^2/2xmass

Question 38

relation of ke and wd

Answer 38

kinetic energy = work done

Question 39

work done equation using u and v

Answer 39

W=1/2mv^2-1/2mu^2

Question 40

what is potential energy

Answer 40

the energy possessed by a body by virtue of its positin in afield or state of strain is called potential energy

Question 41

definiton gravitational potential energy

Answer 41

the enregy possessed by a body due to its position in the gravtiational field of earth called gravitation potential energy

Question 42

potential energy equation

Answer 42

P.E= mgh

Question 43

deffiniton of potential energy of a spring

Answer 43

when a spring is streched or compressed from its normal position a restoring force is set up inside the spring

Question 44

spring force equation

Answer 44

F=-kx where k is the spring constant and the -ve sign indicates that restoring force is opposite to the displacement

Question 45

total work done on a spring equation

Answer 45

work done on a spring = 1/2kx^2

Question 46

conservation of energy

Answer 46

energy xan neither be created nor destroyed. it can only be transformed from one form into another withour gain or loss

Question 47

stess equation

Answer 47

force/area

Question 48

strain equations

Answer 48

strain=🔺L/L

Question 49

young modulus equation

Answer 49

stress / strain