Homework - Energy Resources

What is chemical energy and where is it stored?

• Chemical energy is found in the atmosphere.

• Chemical energy is stored in the bonds of chemical compounds.

• Chemical energy is released during physical changes.

• Chemical energy is stored in the nucleus of an atom.

Define kinetic energy and its dependence on mass and velocity.

• Kinetic energy is the energy of motion, dependent on mass and the square of velocity.

• Kinetic energy is the energy of potential, dependent on height and mass.

• Kinetic energy is the energy of rest, dependent only on mass.

• Kinetic energy is the energy of sound, dependent on frequency and amplitude.

What is gravitational potential energy?

• The energy required to lift an object off the ground.

• Gravitational potential energy is the energy stored in an object as a result of its position in a gravitational field.

• The energy associated with the motion of an object in space.

• The energy produced by gravitational waves.

Explain elastic energy with an example.

• Elastic energy is the kinetic energy of a moving object.

• Elastic energy is the energy released when an object breaks apart.

• Elastic energy is the potential energy stored in a deformed object, like a stretched bowstring.

• Elastic energy is the energy produced by chemical reactions.

How is thermal energy related to temperature?

• Thermal energy is independent of temperature.

• Temperature has no effect on thermal energy.

• Thermal energy decreases with temperature.

• Thermal energy increases with temperature.

What is magnetic energy and how is it stored?

• Magnetic energy is the energy stored in a magnetic field, typically in inductors or magnetic materials.

• Magnetic energy is the energy released during chemical reactions.

• Magnetic energy is the energy produced by moving charges in a circuit.

• Magnetic energy is the energy stored in electric fields.

Describe electrostatic energy and its significance.

• Electrostatic energy is the energy stored in chemical bonds, essential for molecular formation.

• Electrostatic energy is the energy of moving particles, crucial for thermal conductivity.

• Electrostatic energy is the potential energy due to the position of charged particles, significant for atomic stability and electrical interactions.

• Electrostatic energy refers to the energy of magnetic fields, important for gravitational interactions.

What are the methods of energy transfer?

• Photosynthesis

• Electromagnetic induction

• Nuclear fusion

• Conduction, convection, radiation

Explain the principle of conservation of energy.

• Energy is only lost in transformations.

• Total energy in a closed system can increase over time.

• Energy can be created from nothing.

• Energy cannot be created or destroyed, only transformed; total energy in a closed system remains constant.

What does efficiency mean in the context of energy resources?

• Efficiency refers to the total amount of energy produced regardless of waste.

• Efficiency means the effective conversion of energy resources into useful work with minimal waste.

• Efficiency means using energy resources without any conversion to work.

• Efficiency is the process of increasing energy consumption for better performance.