Energy Concepts and Transformations

This video tutorial covers the energy topic in GCSE physics, including energy stores, transfers, and equations for kinetic and potential energy. It explains specific heat capacity, conservation of energy, and power. The video also discusses heat transfer through conduction and convection, efficiency in energy use, and different energy resources. Finally, it explains the National Grid and its role in electricity distribution.

Which of the following is NOT an energy store mentioned in the video?

• Kinetic

• Thermal

• Nuclear

• Electrical

What happens to the gravitational potential energy of a tennis ball as it falls?

• It increases

• It decreases

• It remains constant

• It is converted to thermal energy

What is the equation for kinetic energy?

• E = kx^2

• E = mcΔT

• E = 1/2 mv^2

• E = mgh

Which unit is used for gravitational field strength?

• Newtons per kilogram

• Joules

• Meters per second

• Watts

What does specific heat capacity measure?

• The energy required to melt 1 kg of a substance

• The energy required to increase the temperature of 1 kg of a substance by 1°C

• The energy required to vaporize 1 kg of a substance

• The energy required to cool 1 kg of a substance by 1°C

According to the conservation of energy, energy can be:

• Lost

• Transferred

• Destroyed

• Created

What is the rate of doing work called?

• Energy

• Power

• Efficiency

• Force

Which method of heat transfer occurs in liquids and gases?

• Conduction

• Diffusion

• Convection

• Radiation

Which of the following is a renewable energy resource?

• Solar

• Natural Gas

• Nuclear

• Coal

What is the purpose of a step-up transformer in the National Grid?

• To store energy

• To convert AC to DC

• To increase voltage

• To decrease voltage