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Physics > 1143 Definitions > Flashcards

1143 Definitions Flashcards

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Physics 101 flashcards AP® Physics flashcards
1
Q

deflected toward a negative charge

A

alpha particle

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2
Q

deflected toward a positive charge

A

beta particle

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3
Q

not deflected in an electric or magnetic field

A

gamma ray

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4
Q

a high-speed electron from a CRT

A

cathode ray

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5
Q

an electromagnetic wave just above ultraviolet waves

A

x-ray

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6
Q

computer terminal or monitor

A

cathode ray tube

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7
Q

same mass as an alpha particle

A

helium nucleus

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8
Q

most common radioactive element

A

uranium

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9
Q

emit charged particles and electromagnetic waves

A

radioactive elements

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10
Q

same mass as a beta particle

A

electron

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11
Q

Two improvements in modern x-ray tubes

A

higher vacuum

higher voltage

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12
Q

penetrating power of beta particle

A

100 times that of an alpha

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13
Q

discovered alpha and beta particles and gamma radiation

A

Ernest Rutherford

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14
Q

developed the first cloud chamber

A

Charles Thomson Wilson

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15
Q

discovered uranium

A

Martin Klaproth

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16
Q

suffered severe skin burns while experimenting with radium

A

Pierre Curie

17
Q

discovered cathode rays

A

William Crookes

18
Q

invented a radiation detector that uses ionized gas

A

Hans Geiger

19
Q

investigated the basic properties of cathode rays

A

J.J. Thomson

20
Q

discovered x-rays

A

William Roentgen

21
Q

demonstrated that cosmic rays are charged

A

Arthur Compton

22
Q

discovered the radioactive nature of uranium particles

A

Henri Becquerel

23
Q

demonstrated that cosmic rays come from space

A

Robert Millikan

24
Q

A color band running from red to violet with smooth color transitions

A

a continuous spectrum

25
Q

A series of bright, narrow lines of certain colors on a dark background

A

an emission spectrum

26
Q

a quantum

A

a discrete bundle of energy

27
Q

a photon

A

a discrete bundle of light energy

28
Q

Three kinds of spectra discovered by Prof. Kirchoff and Prof. Bunsen

A

absorption
continuous
emission

29
Q

Physical properties of an atom are determined by

A

atomic mass

30
Q

Atomic number

A

Number of protons

31
Q

Property that distinguishes elements exactly

A

Atomic number

32
Q

Constant for speed of light in a vacuum

A

3x10^8

33
Q

Formula for increase in mass due to motion

A

M/(1-v^2/c^2)^1/2

Physics (22 decks)

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