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1Gcsephysics > Everything1 > Flashcards

Everything1 Flashcards

1
Q

Formula of Momentum

A

Mass X Velocity

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2
Q

Formula for Kinetic Energy

A

1/2 X Mass X Velocity^2
1/2mv^2

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3
Q

Formula for Power

A

Work done/Time taken W/t
Energy transferred/Time taken E/t

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4
Q

Efficiency’s formula

A

Useful Energy output/total energy output

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5
Q

Formula for Speed,Distance,Time

A

DST
Distance=Speed x Time
Speed=Distance/Time
Time=Distance/Speed

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6
Q

Formula of Resultant Force

A

Mass X Acceleration

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7
Q

Formula for work done

A

Force X Distance

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8
Q

Weight

A

Gfs x mass

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9
Q

Formula of elastic potential energy

A

1/2 k e^2

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10
Q

Acceleration

A

Final speed - initial speed /time

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11
Q

Formula for pressure

A

Force / area

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12
Q

All waves transfer energy but not

A

Matter , matter is not transferred

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13
Q

Longitudinal waves vibrate BLANK to the direction of wave travel

A

parallel

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14
Q

Transverse waves vibrate BLANK to the direction of wave travel

A

Perpendicular

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15
Q

Equation for time period in waves

A

Time period= 1/ Frequency

T= 1/f

T is in seconds measured in
F frequency is measured in HZ

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16
Q

What is the equation for wave speed?

A

Wave speed = frequency X wavelength

V = Fㅅ

m/s = Hz X Metres

17
Q

Newtons first law and explain it

A

Inertia. It is the tendency fir moving objects to keep moving

18
Q

What is inverse square law

A
19
Q

Energy unit

A

Joule

20
Q

What is radiation?

A

Release of energy in the forms of moving waves or streams of particles

21
Q

Radiation can be inozing and non ionizing whats the difference

A
22
Q

3 types kf radioactive decay

A

Alpha
Beta
Gamma

23
Q

Unit of radioactivity

A

Becquerel (Bq)
1 Bq= 1 nuclear decay per second

24
Q

Radioactive substances emit radiation no matter what is done

A
25
Q

Unstable nuclei are the reason of radioactivity
This is due to

A

Too many neutrons or protons
Large size.

26
Q

Order of the EM SPECTRUM

A

Raging Martians Invaded Venus Using X-ray Guns

radio waves radiation, microwave radiation, infrared, visible light, ultraviolet, X-rays, and gamma rays

27
Q

What is Activity?
And the units

A

The activity of a radioactive source is the number of
unstable nuclei that decay every second

Units Becquerel

28
Q

What is Activity?

A

The activity of a radioactive source is the number of
unstable nuclei that decay every second

29
Q

What is count rate

A

Count rate is The number of decys recorded each second by a detector

30
Q

What is count rate

A

Count rate is The number of decys recorded each second by a detector

1Gcsephysics (1 decks)

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