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s2 physics > mod test > Flashcards

mod test Flashcards

1
Q

what is high entropy

A

disordered (sand grains)

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2
Q

what is low entropy

A

ordered (sand castle)

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3
Q

what is the passage of time is measured by

A

change

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4
Q

what is the trend of the universe

A

to move from order to disorder

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5
Q

what is the arrow of time

A

the past —— the future

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6
Q

what is the entropy arrow

A

order —— disorder

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7
Q

how old is the universe

A

13.8 billion years old

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8
Q

what is the formula to find distance

A

speed x time

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9
Q

what is the formula to find speed

A

distance / time

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10
Q

what is the speed of light

A

the highest speed ever achievable in the universe

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11
Q

what is the symbol given to the speed of light

A

c

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12
Q

what is the speed of light (numbers)

A

3 x 10,8ms-1

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13
Q

what is a light year

A

how far light travels in a year

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14
Q

who was the first to say that the universe is expanding

A

Monsignor Gerges Lamaître

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15
Q

who gave experimental proof that the universe is expanding

A

Edwin Hubble

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16
Q

what is recessional speed

A

the speed with with it is moving away from the oberver on earth

17
Q

what is the big bang

A

alot of energy which came from an infinitey small point

18
Q

What were the first partickes to form after the big bang

A

Quarks

19
Q

What are the differnt types of quarks

A

Up,down,strange,charming,top,bottom

20
Q

What is the formula of a proton

A

Two up, one down

21
Q

What is the formula of a neautron

A

Two down, one up

22
Q

What is the nucleus of a hydrogen atom

A

a proton (carrying positive charge)

s2 physics (1 decks)

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