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Physics > Physics Module Test S2.2 > Flashcards

Physics Module Test S2.2 Flashcards

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1
Q

What is time measured by

A

Something changing

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2
Q

Give an example of time passing

A

A plant growing

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3
Q

What state does universe naturally move in what is this called

A

Order to disorder
The arrow of time

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4
Q

What is entropy

A

The measure of disorder

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5
Q

Give an example of entropy

A

A pile of sand has high entropy
And a sand castle has low entropy

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6
Q

What age is the universe

A

13.8 billion

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7
Q

What entropy is the universe moving

A

Low entropy to high entropy

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8
Q

What is the speed of light

A

3x10(8) m/s

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9
Q

What is the symbol of light

A

C

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10
Q

What is the greatest achievable speed

A

The speed of light

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11
Q

What is velocity

A

Speed

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12
Q

What is the formula for distance

A

D=sxt

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13
Q

What is the formula for speed

A

S=D/T

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14
Q

What is the formula for time

A

T=D/S

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15
Q

What are you looking at if your looking back in time

A

The stars

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16
Q

What is a light year

A

It’s how far light travels in a year

17
Q

Who was first to suggest the universe is expanding

A

Monsignor Georges lemaître

18
Q

Who obtained experimental proof of lemaîtires theory the universe is expanding

A

Edwin Hubble

19
Q

What is hubbles law

A

How the further away a galaxy is the greater it’s recessional speed

20
Q

The Big Bang happened when

A

13.8 billion years ago

21
Q

Give an account on the Big Bang

A

The Big Bang was what scientists believe created the universe it was a big ball of energy that exploded

22
Q

What we’re the first things formed after the Big Bang

A

Quarks

23
Q

What are the 7 quarks

A

Up
Down
Top
Bottom
Charm
Strange

24
Q

What makes a proton

A

U U
D

25
Q

What makes a neutron

A

D. D
U

26
Q

what is an atom

A

an atom is the smallest particle of a chemical element

27
Q

what is a nucleus

A

the center and most important part of an object

28
Q

what is an element

A

something made of one type of atom

29
Q

what does the atomic number mean

A

the number of protons in a nucleus

30
Q

what is the mass number mean

A

the total number of neutrons and protons in the nucleus

31
Q

What is an atom

A

The smallest particle in a chemical element

32
Q

What is a nucleus

A

A nucleus is the central and most important part of an object forming the basis for its growth

33
Q

What is an element

A

A substance that consist of only one type of atom

34
Q

What is the atomic number

A

The number of protons in the nucleus

35
Q

What is the mass number

A

This is the total number of protons +neutrons in the nucleus

Physics (4 decks)

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