Energy (Seneca) Flashcards
What is a Kinetic store?
The energy stored by an object’s movement.
What is a Gravitational potential store?
The energy stored in objects raised above the Earth’s surface.
This energy exists because of the Earth’s gravitational field.
What is a Chemical store
The energy stored by the chemical bonds between atoms.
What is a Elastic potential store
The energy stored when an object is being stretched, compressed or squashed.
What is a Nuclear store
The energy stored in the nucleus of an atom.
The energy in the nuclear store can be released by radioactive decay.
What is a Internal (thermal) store?
The internal store of energy is the sum of the:
- kinetic energy stored in the particles of an object
- the chemical energy stored in chemical bonds between particles in the object.
Energy is added to your body’s 1. when you eat food.
Energy is stored there until you need it.
Your body then transfers it to your 2. when you need to keep warm, or to your 3. to move about.
- chemical store
- thermal store
- kinetic store
The amount of energy in an object’s internal energy is the …
sum (total) of the kinetic energy and potential energy stored in the object’s particles.
The temperature of a body (object) is a measure of the …
energy in the kinetic stores of its particles.
Increasing a body’s temperature increases the 1. , which means that 2.
- energy in the kinetic stores of the body’s particles
- the energy in the body’s internal store also increases.
kinetic energy=
1/2 ×mass(kg)×velocity(m/s)2
change in gravitational potential energy (J) =
mass(kg) ×gravitational field strength (N/kg) ×change in height (m)
The elastic potential energy (measured in joules) is equal to …
half the spring constant (in Newtons per metre) multiplied by the extension (in metres) squared.
v=
√(2E ÷ m)
Ee(j)=
0.5 x k (n/m)x e(m)2
E(m) =
√ ( 2Ee (j)/ k (n/m))
K (m) =
(2 x Ee (j)) / e (squared) (m)
Heating an object transfers energy to …
the object’s internal store of energy (the sum of the energy in the kinetic and chemical stores of its particles).
Energy transferred from one object to another via a force is an example of …
mechanical work
When an object falls from a building, the weight does …
mechanical work to transfer energy from the gravitational potential store to the kinetic store.
When you push a wheelchair, energy is transferred to the —– store of the wheelchair.
kinetic
———— can transfer energy from one object to another.
Light and other types of waves
An electrical current transfers ———from one object to another, such as a battery powering a torch.
energy
Methods of energy transfer:
- mechanical work
- electrical work
- heating
- waves