NCFE Physical Science Practice

Front

What is displacement?

Back

Displacement is the shortest distance from the initial to the final position of an object, along with the direction.

Front

How do you calculate displacement?

Back

Displacement can be calculated using the formula: Displacement = Final Position - Initial Position.

Front

What is the difference between distance and displacement?

Back

Distance is the total path traveled, while displacement is the straight line distance from the starting point to the endpoint.

Front

What is the purpose of a transformer in electrical circuits?

Back

A transformer is used to change the voltage of alternating current (AC) while maintaining the power.

Front

What is thermal conductivity?

Back

Thermal conductivity is a measure of a material's ability to conduct heat.

Front

Why do metals feel colder than wood at the same temperature?

Back

Metals feel colder because they have higher thermal conductivity, allowing them to transfer heat away from the skin more quickly.

Front

What is the chemical formula for magnesium phosphate?

Back

The chemical formula for magnesium phosphate is Mg₃(PO₄)₂.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state, commonly gravitational potential energy.