Energy Flashcards

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1
Q

what are the 9 types of energy?

A

kinetic, electrical, heat, light, sound, nuclear, gravitational, elastic, chemical

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2
Q

what are the 5 active energy’s

A

electrical, sound, kinetic, heat, light

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3
Q

what are the 4 potential energy’s

A

gravitational, energy, elastic, chemical

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4
Q

how does the size of particles affect the rate of reaction?

A

Smaller particles diffuse faster, bigger ones diffuse slower.

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5
Q

define diffusion

A

the random movement of particles that causes them to spread out and mix

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6
Q

what is the formula used for efficiency?

A

efficiency= useful/total x 100

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7
Q

what is energy measured in?

A

joules ( J )

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8
Q

what factors affect the quantity of heat energy in a substance

A

mass, temp, and types of atoms.

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9
Q

Describe what happens to the temp, energy, and particles during melting

A

Particles gain energy but the energy is used to weakedn the forces between particles. The speed of the particles don’t change, and neither dose the temp. Particles start sliding

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10
Q

Describe what happens to the temp, energy, and particles during heating of a liquid

A

Particles slide over each other, they gain energy as they slide faster. Temp increases due to the average speed of the particles

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11
Q

Describe what happens to the temp, energy, and particles during boiling

A

Particles gain energy but the energy is used to break the forces between particles. Speed of particles dont change and same for temp

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12
Q

what are 3 types of heat transfer?

A

conduction, convection, radiation,

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13
Q

where does convection occur?

A

liquids and gases (fluids)

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14
Q

where does conduction occur?

A

solids

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15
Q

where dose radiation occur?

A

they transfer heat without particles, particles only slow down radiation but don’t stop it. so they are able to travel in vacuums, solids, liquids, and gasses.

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16
Q

what are the 7 sections of the electromagnetic spectrum

A

1.Radiowave - 2.microwave- 3.infa-red -4.visible light- 5.UV light - 6. X-rays - 7. Gamma rays

17
Q

how does colour affect the rate of absorption/emission of radiation?

A

black objects both absorb and emit radiation faster, while white objects absorb and emit radiation slower.

18
Q

Describe the experiment used to measure the rate of conduction?

A

Stick a pin onto the end of a metal strip with vaseline, heat the other end and see how long it takes to drop.