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further maths > separate science > Flashcards

separate science Flashcards

1
Q

What is the word equation for kinetic energy?

A

kinetic energy = 0.5 × mass × speed2

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2
Q

What is the word symbol for kinetic energy?

A

Ek = ½ m v2

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3
Q

What is the word equation for gravitational potential energy?

A

gravitational potential energy = mass × gravitational field strength (g) × height

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4
Q

What is the symbol equation for gravitational potential energy?

A

Ep = m g h

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5
Q

What is the word equation for power energy?

A

power = energy transferred
time

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6
Q

What is the symbol equation for power energy?

A

P = E
t

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7
Q

What is the equation foe efficiency?

A

efficiency = useful output energy transfer
total input energy transfer

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8
Q

What is a eukaryotic cell?

A

a cell with membrane bound organelles

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9
Q

What is a prokaryotic cell?

A

there usually are a lot smaller. note that they sometimes have cell walls

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10
Q

What is the equation for magnification?

A

Magnification = size of image/size of real object

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11
Q

Define diffusion

A

Diffusion is the spreading out of particles of a substance from an area of higher concentration to an area of lower concentration.

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12
Q

Name 3 things that effect the rate of diffusion

A

The rate of diffusion is increased by the difference in concentration, the temperature and the available surface area.

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13
Q

what is osmosis?

A

Osmosis is a special case of diffusion. It is the movement of water from a dilute to a more concentrated solution through a partially permeable membrane.

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14
Q

What is active transport?

A
  • Moves substances from a more dilute solution to a more concentrated solution (against a concentration gradient). requires energy
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15
Q

how is dna stored in prokaryotic cells?

A
  • The genetic material in a prokaryotic cell is a loop of DNA
  • Prokaryotes also have small extra loops of DNA called plasmids
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16
Q

24 What is the unit of specific heat capacity?

A

J/kg °C

17
Q

What is the specific heat capacity of a substance?

A

It is the amount of energy required to raise the temperature of 1 kg of the substance by 1 °C

18
Q

How can the efficiency of an energy transfer be increased?

A

By using lubrication or insulation

19
Q

What is the mass number?

A

The sum of protons and neutrons in the nucleus

20
Q

What is the atomic number?

A

Number of protons in an atom

21
Q

are the number of protons= the number of electrons. true or false

A

true

22
Q

are the number of neutrons= the number of electrons. true or false

A

false

23
Q

What occurs during cytokinesis?

A

The cytoplasm and cell membranes divide.

24
Q

What is a potential use of stem cells in medicine?

A

To treat conditions where cells have been damaged e.g. diabetes, paralysis.

further maths (2 decks)

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