How is weight calculated from mass?

Weight (W) = mass (m) × gravity (g).

What happens to an object's weight when taken to the Moon?

It weighs less due to weaker gravity.

The force applied per unit area.

What is the formula for pressure?

Pressure (P) = Force (F) / Area (A).

The property of an object to maintain its state of rest or motion unless acted upon by a force.

What is the relationship between force, mass, and acceleration?

Force (F) = mass (m) × acceleration (a).

What is the principle of moments?

If an object is in equilibrium, the sum of clockwise moments equals the sum of anticlockwise moments.

What is the center of gravity?

The point where the total weight of an object acts.

What is thermal energy?

The total kinetic and potential energy of the particles in a material.

The energy absorbed or released during a phase change without a change in temperature.

The transfer of thermal energy through a material without the material itself moving.

The transfer of thermal energy by the movement of fluids (liquids and gases).

The transfer of energy through electromagnetic waves.

What is nuclear fission?

The process of splitting a heavy nucleus into lighter nuclei, releasing energy.

What is nuclear fusion?

The process of combining light nuclei to form a heavier nucleus, releasing energy.

What is the law of conservation of energy?

Energy cannot be created or destroyed, only transformed from one form to another.

What is the difference between mass and weight?

Mass is the amount of matter in an object, while weight is the gravitational force acting on that mass.

What is the formula for calculating work done?

Work done (W) = Force (F) × Displacement (s).

What is kinetic energy?

The energy of an object due to its motion.

What is the formula for kinetic energy?

Kinetic Energy (KE) = 1/2 mv².

The product of an object's mass and its velocity.

What is the formula for momentum?

Momentum (p) = mass (m) × velocity (v).

What is the difference between vectors and scalars?

Vectors have both magnitude and direction; scalars have only magnitude.

What is the principle of conservation of momentum?

In a closed system, the total momentum before an event is equal to the total momentum after the event.

What is the formula for efficiency?

Efficiency = (Useful energy output / Total energy input) × 100%.

What is the formula for power?

Power (P) = Work done (W) / Time taken (t).

What is the difference between renewable and non-renewable energy?

Renewable energy can be replenished naturally; non-renewable energy cannot be replaced once used.

What are fossil fuels?

Natural fuels formed from the remains of ancient plants and animals.

What is the main concern with nuclear energy?

The management of radioactive waste.

What is the role of a moderator in a nuclear reactor?

To slow down neutrons to sustain the chain reaction.

What is background radiation?

The natural radiation present in the environment.

What is ionizing radiation?

Radiation that can remove electrons from atoms, creating ions.

What is the half-life of a radioactive isotope?

The time taken for half of the nuclei in a sample to decay.

What is the activity of a radioactive sample?

The number of disintegrations per second, measured in becquerels (Bq).

What is the difference between alpha, beta, and gamma radiation?

Alpha particles are heavy and positively charged; beta particles are lighter and negatively charged; gamma rays are high-energy electromagnetic waves.

What is the effect of temperature on the kinetic energy of particles?

Higher temperature increases the kinetic energy and movement of particles.

What is thermal expansion?

The increase in volume of a material as its temperature rises.

What is the significance of the Kelvin scale?

It starts at absolute zero, where all particle motion stops.

Flashcards 3F Flashcards

Student preview

95 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is the unit used for measuring forces?

Back

Newton (N)

2.

FLASHCARD QUESTION

Front

What is the pull of gravity on an object called?

Back

Weight

3.

FLASHCARD QUESTION

Front

What is air resistance?

Back

The force of friction when an object moves through air or water.

4.

FLASHCARD QUESTION

Front

What is upthrust?

Back

The upward push of a liquid or gas on an object.

5.

FLASHCARD QUESTION

Front

What does friction do?

Back

Opposes motion.

6.

FLASHCARD QUESTION

Front

What is the resultant force?

Back

The single force that has the same effect as two or more forces.

7.

FLASHCARD QUESTION

Front

What happens if the resultant force equals zero?

Back

The forces are balanced, and the object continues moving at a constant speed.

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