What is a derived quantity?

A physical quantity derived from base quantities using multiplication, division, or formula.

A standard measurement of a physical quantity.

What is dimensional analysis?

A method to determine how a physical quantity is related to other different base quantities.

What does the principle of homogeneity of dimension state?

If both sides of an equation have the same dimension, then it is dimensionally homogeneous.

A physical quantity which has magnitude only.

A physical quantity which has both magnitude and direction.

What is an error in measurement?

The uncertainties in measurement.

What is systematic error?

An error where the measured value consistently deviates from the actual value.

What is random error?

An error where the measured value fluctuates about the actual value.

What is linear motion?

A motion along a straight line.

What is average speed?

Total distance travelled / total time taken.

What is instantaneous speed?

Distance travelled / time taken.

What is average velocity?

Change in displacement / total time taken.

What is acceleration?

Change in velocity / time taken.

Any motion of a body under gravitational force without air resistance.

What is Newton's first law of motion?

An object at rest will remain at rest; a body in motion will remain in motion unless acted upon by an external force.

What is Newton's second law of motion?

The rate of change of momentum of a body is directly proportional to the resultant force on it.

The product of mass and velocity.

Change in momentum of a body due to the action of a force.

The scalar product of force and displacement.

What is angular displacement?

The angle undergone by a particle moving in a circle.

What is the principle of conservation of energy?

Energy cannot be created or destroyed, only transformed.

What is heat capacity?

The amount of heat required to raise the temperature of an object by 1K.

What is the photoelectric effect?

The ejection of electrons from a metal surface when light shines on it.

What is the wave-particle duality?

The phenomenon where particles exhibit wave properties and waves exhibit particle properties.

What is nuclear fission?

The splitting of a heavy nucleus into two lighter nuclei with the release of energy.

What is nuclear fusion?

The process in which two light nuclei combine to form a heavier nucleus with the release of energy.

What is the Doppler effect?

The apparent change in frequency of sound due to relative motion between the source and observer.

What is the critical angle?

The angle of incidence when the angle of refraction is 90º.

What is Young's modulus?

The ratio of longitudinal stress to strain.

What is the first law of thermodynamics?

The heat absorbed by the system is equal to the increase in internal energy and work done by the system.

What is the half-life of a radioactive substance?

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

What is binding energy?

The amount of energy required to separate all nucleons in a nucleus.

What is the significance of the refractive index?

It describes how much light bends when entering a material.

What is the principle of superposition?

When two waves meet, the resultant displacement is the sum of the individual displacements.

What is thermal conductivity?

The rate at which heat flows through a material.

What is the law of equipartition of energy?

The energy of gas molecules is equally divided among their degrees of freedom.

What is the significance of the escape velocity?

The minimum velocity required for an object to escape a planet's gravitational pull.

Physics Definitions and Formulae for Semester 1 and 3 Flashcards

Student preview

86 questions

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1.

FLASHCARD QUESTION

Front

What are physical quantities?

Back

Quantities that can be measured.

2.

FLASHCARD QUESTION

Front

What is a scalar product?

Back

a.b = |a||b|cosθ

3.

FLASHCARD QUESTION

Front

What is a vector product?

Back

a x b = |a||b|sinθ

4.

FLASHCARD QUESTION

Front

What is absolute uncertainty?

Back

∆l

5.

FLASHCARD QUESTION

Front

What is fractional uncertainty?

Back

∆l/l

6.

FLASHCARD QUESTION

Front

What is percentage uncertainty?

Back

(∆l/l) x 100%

7.

FLASHCARD QUESTION

Front

What is a base quantity?

Back

A physical quantity that cannot be derived from other physical quantities.

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